Tuesday, November 17, 2009

How to create an artificial fog effect in Flash

I have this photo of a snowy backyard.
Create a new Flash document. To do this, go to File >New. Select Flash Document. Click OK. We will use the image of the snowy backyard for this. Import the image to your library by File > Import > Import to library. Then select the image to import in the library.
Drag the image from library to your stage area. Then, resize your stage area to the size of your image. To do this, click on the image and look at the properties panel
which is found at the bottom by default.
Remember the width and height then resize your stage area.
Align your image by clicking on the image. And from the Align panel make sure you click first To Stage icon, then Align Left Edge and Align Top Edge.

Rename the first layer to “background” then lock the layer.
Create a New layer, and we can name it to “fog”
Select the Brush Tool, and then set the stroke color to white. Also choose the medium Brush size.
Now at layer 2, draw some random wiggles across the stage area at the lower part.
Select everything or all the wiggles you draw, with the Selection tool. Then hit on F8 or go to Modify > Convert to Symbol… F8, to convert this to a Movie clip. You can name the clip to “fog_mc”

Double click on the movie clip to edit it.
Select everything again with the Selection tool. Then, hold on to your Shift + Alt button. While holding on to these buttons, drag them to the right to make a copy.
Scroll the timeline up to frame 200 and press F^ to create a new keyframe
We will then need to add a motion tween from frame 1 to 100 by right-clicking between them, and selecting “Create Motion Tween”

Select frame 200 to select the movie clip. Then hold down Shift button so you can drag the wiggles to the right, until it is almost matching up the same wiggle shape. Notice that the objects are released on a different position.

Go back to scene 1. You can also preview the loop by pressing Ctrl + Enter
Now we will need to transform these wiggles to a fog effect. To make this to a fog effect, we need to blur it. To do this, select the movie clip. Go to Filters tab, then click on the plus icon/button to add blur.
Set the Blur X and Blur Y to about 70, with the Quality Low
And we are done. You can preview it by clicking Ctrl + Enter
Here is the picture of the original scenery so you can compare:

How to make pictures more clear

Method 1 – Using an extra layer

First, open the image in Photoshop and press CTRL + J to duplicate the background layer.

photoshop duplicate layer
Next, go to Filter, then Other, and choose High Pass. The higher the value you set it to, the sharper your image will become. However, if you set it really high, the image will become grainy. I set mine to 10 pixels.
filter other high pass
Now click on the layer and set the blending mode to Hard Light and adjust the Opacity to whatever you think makes the image look best. It’s set to 100% by default, but you may get better results at 50% or something else, so just play around with that value.
blurry image photoshop
That’s it! Your image should now be much sharper looking! Unforunately, if your image is very blurry or the blurriness is caused by really fast motion, you probably won’t be any major difference.
The best results are when the image is simply our of focus because the camera focused on the wrong object or something similar.
That’s it! Your image should now be much sharper looking! Unforunately, if your image is very blurry or the blurriness is caused by really fast motion, you probably won’t be any major difference.
The best results are when the image is simply our of focus because the camera focused on the wrong object or something similar.

Method 2 – Sharpen image
The other easier option is to simply use the sharpen tool, but you don’t get as good results with it.
To use the sharpen tool in Photoshop, just go to Filter, then Sharpen and choose from any of the options, such as Sharpen, Sharpen Edges, Sharpen More, and Smart Sharpen.
photoshop filter sharpen
Hopefully, these two simple methods can make your blurry images clearer and sharper! Enjoy!

Tuesday, October 20, 2009

How to trace the original location of an email via its IP address

Finding the IP address of an email sender in GMail, Yahoo Mail.
Google’s Gmail

1. Log into your account and open the email in question.
2. Click on the down arrow that’s to the right of the Reply link. Choose Show Original from the list.

Now here’s the technical part that I was telling you about earlier! You need to look for the lines of text that start with “Received: from“. It might be easier to simply press Cntrl + F and perform a search for that phase. You’ll notice that there are several Received From’s in the message header. This is because the message header contains the IP addresses of all of servers involved in routing that email to you.

To find the first computer that originally sent the email, you’ll have to find the Received From that’s farthest DOWN. As you can see from the above image, the first one is from a computer called “aseem” with the IP address Then it was routed to my ISP’s server at eastrmmtao104.cox.net and so on and so forth till it got to your email server.

The computer aseem is my personal home computer and that’s my public IP address for my house! I’ll go through Yahoo and Outlook before talking about tracking the location of that IP address.

Yahoo Mail Beta
1. Log into your account and open the email (if you’re using Yahoo Mail Beta with the new preview interface, make sure you double-click on the email so that it opens in a new tab)
2. At the top right, you’ll see there is a drop-down option where Standard Header is selected by default.
3. Click on it and choose Full Header.

Again, you’ll see the same information as before, just in a different window:

Tracking the location of an IP address :

Now that we have our originating IP address of, let’s find out where that is! You can do this by perform a location lookup on the IP address. My favorites are IP2Location and GeoBytes IP Locator.
GeoBytes gave me a big map of New Orleans, LA along with a bunch of other information about the location itself.
IP2Location also gave me the same information pretty much, including the ISP (Cox Communications). Of course, this is correct since I live in New Orleans!
If you want more information, you can do a WHOIS database search also. My favorite one is the ARIN WHOIS Database Search. This will give you information on who hosts that IP address and their registration information. You can always contact them to try and find more information on that particular IP address.
Have fun tracking down those emails! Questions, comments, or suggestions? Post a comment!

Friday, October 16, 2009

Here is a way on how to create a simple batch file virus

Write it in a notepad Cycle a message in your friend's computer(code is given below)
Type :
@ECHO off
msg * Hi
msg * Are you having fun?
msg * I am!
msg * Lets have fun together!
msg * Because you have been o-w-n-e-d

Save it as "Anything.BAT" and send it.

how is it.....?

Speeding up the hard drive

Vista has a feature of utilizing the hard drive to its max, but in the event of power failure, there are chances of data loss....thats why this feature is turned off.....But if you got some backup power through UPS, you can enable this feature.....

Note: try this only if you got an UPS for auxilary power.

1)Right click on My Computer icon on the desktop and click properties. Click on device manager.
2) click on the little plus sign in front of Disk drives to display your hard drive(s).
3)choose the hard drive you want to optimize.Right click on it and click properties.
4)Click the Policies tab.
5)Check the Enable advanced performance box and click OK.

Friday, October 9, 2009

Different ways to shutdown

1. Use Alt+F4 to close any programs running already (one press to close one program) NOTE: does not close minimised programs! When all the programs are closed, another press of ALT+F4 will ask if you want to Shut Down, Restart, Or set to Stand By mode. Then press U for Shut Down, R for Restart or S for Stand By.
2. press the Windows key (between Ctrl and Alt) which will bring up the Start Menu, then press U for Shut Down, and U again for Shut Down.

3. Ctrl+Esc opens the Start menu. (Instead, you could use the Windows key.) Pressing the u key selects whichever menu item has an underlined u. (Note that if your menu has other options that begin with a U, such as “User Preferences,” then you’ll have to hit u more than once and then hit Enter when Shut Down is selected.)

Then it gives u a list if u either want to
shut down..
Hibernate. or restart your pc.

5. Shortcut Keys to Shutdown and Restart your Computer
Get ready and follow these points to experiment.
1. On your desktop, right click>shortcut(select shortcut)
2. You will then see a Popup Window(Create Shortcut wizard)
3. In ‘Type the location of the item’, Key in ‘Shutdown -s -t 01′
Click ‘Next’ and you will be prompt to name the Shortcut. Give it any name you want and click ‘Finish’.
Now, whenever you hope to shutdown your Computer or laptop. Simply double click on this shortcut icon.
You can also fully customize this shortcut Icon.
Right Click>’Properties’>’Change Icon’
This allows you to change Shortcut Icon to any image you want.
If you want to create a Shortcut Icon for restarting your Computer or Laptop, Simply change -s to -r.
As s stand for shutdown while r stands for restart.
Change the number after -t to set the time of your Computer and Laptop to wait in seconds before shutting down.
You can also insert a comment by adding -c ‘Your Text’ to the line. It will display the Text you specified while counting down the time in seconds.

Wednesday, October 7, 2009

Tuesday, October 6, 2009

Computer cartoons

IE7 Shortcuts & tips

keyboard shortcuts:

Toggle between full-screen and regular views of the browser window F11
Go to the next page ALT+RIGHT ARROW
Go to the previous page ALT+LEFT ARROW or BACKSPACE
Find on this page CTRL+F
Close the current window (if you only have one tab open) CTRL+W or ALT+F4
Open Favorites CTRL+I
Switch between tabs CTRL+TAB or CTRL+SHIFT+TAB
Go to the search box CTRL+E
Print the current page CTRL+P
Select the text in the Address bar ALT+D
Add “www.” to the beginning and “.com” to the end of the text typed in the Address bar CTRL+ENTER
Display a list of addresses you’ve typed F4
Add the current page to your favorites CTRL+D
Select all items on the current webpage CTRL+A
Change number of days web pages are kept in browsing history – You can use this setting to keep track of the web sites you have visited over the specified range or you can specify 0 days, which will not keep a web history at all. Click on Tools, Internet Options, General tab, and under Browsing History choose Settings. Under History, specify the number of days.

Customize web site font and color settings – Changing the default settings for font and color are usually for Accessibility purposes, but if you just want to view all the pages you browse in one type of font, then here’s how to change it:
Go to Tools, Internet Options, General tab, and choose Accessibility. Select the Ignore colors specified on webpages, Ignore font styles specified on webpages, and Ignore font sizes specified on webpages check boxes. Then click the Fonts and Colors buttons on the General tab and choose the desired font and color.

Add customized commands to the IE toolbar – There are lots and lots of great ways that you can customize the toolbar in IE, such as using Bookmarklets or installing other third-party add-ons. Bookmarklets are little pieces of Javascript code you can add to IE that extends it’s functionality.
You can customize the toolbar by right-clicking on the command bar and choosing Customize Command Bar. Then click Add or Remove commands and move items between the Available and Current toolbar button lists.
Hope that helps speed up someone’s browsing experience! Enjoy!

How to add website shortcuts to the Windows Start Menu

First, you need to right-click on the Start button and click on Explore.

This will open Windows Explorer in the Start Menu folder under your user profile. If you want to be able to add the website shortcut to the Start Menu for all users, when you right-click, choose Explore All Users instead of Explore. There should be a folder called Programs also, don’t go into that folder.

Now right-click and choose New and then Shortcut.

In the box “Type the location of the item”, go ahead and type in the URL for the website you want to add. For example, type in http://all-abot-cs.blogspot.com/ and click Next.

Give your shortcut a name in the “Type a name for this shortcut” box. This will be the title shown in the Start Menu and it can be whatever you like.
Click Finish and you’re done! There is one thing to remember when it comes to adding website shortcuts to the Start Menu and that is which version of the start menu are you using.However, if you’re using the normal Windows Start Menu that comes with Windows XP, by default the link will only appear when you click Start and then click on Programs.

However, that’s not what we want! We want to be able to click on Start and then simply click on our link, not have to click on Programs first! Luckily it’s very easy to get your link into the main section of the Start Menu and that is by simply opening the programs list and then dragging and dropping the URL to where you want it.

Drag it between any two programs listed and you’ll see that it becomes a dark black line, meaning you can release the mouse button and it will drop it in between the other two shortcuts.

And now that’s it! Hopefully, this was not too complicated of a process! There is no need to edit the registry as some sites suggest, it can all be done via creating a simple shortcut! Enjoy!

How to shrink PDF file size

Print file using Adobe Print driver

The easiest way to try and shrink a PDF file is to perform a little trick, which basically is printing the PDF document to a PDF file. Sounds strange? It is. Basically, you open the PDF file in Adobe Reader and print it to the Adobe PDF printer.

A lot of time this works really well and will significantly reduce the size of your PDF file. When you go to File – Print, choose Adobe PDF from the drop down list of printers:
Amazingly enough, I’ve been able to shrink a 20 MB PDF file down to 3 MB just by using this method. Not really sure what it does to shrink it, but it works, especially if you have a good number of images that are eating up a lot of space.

Sunday, October 4, 2009

Hide files

If you’re looking to hide files on your PC hard drive, you may have read about ways to encrypt folders or change the attributes on a file so that they cannot be accessed by prying eyes. However, a lot of times hiding files or folders in that way requires that you install some sort of software on your computer, which could then be spotted by someone else.
I’ve actually written quite a few articles on how you can hide files and folders in Windows XP and Vista before, but here I’m going to show you a new way to hide files that is very counter-intuitive and therefore pretty safe! Using a simple trick in Windows, you can actually hide a file inside of the JPG picture file!
You can actually hide any type of file inside of an image file, including txt, exe, mp3, avi, or whatever else. Not only that, you can actually store many files inside of single JPG file, not just one! This can come in very handy if you need to hide files and don’t want to bother with encryption and all that other technical stuff.
Hide File in Picture
In order to accomplish this task, you will need to have either WinZip or WinRAR installed on your computer. You can download either of these two off the Internet and use them without having to pay anything. Here are the steps for creating your hidden stash:
Create a folder on your hard drive, i.e. C:\Test and put in all of the files that you want to hide into that folder. Also, place the image that you will be using to hide the files in.
Now select all of the files that you want to hide, right-click on them, and choose the option to add them to a compressed ZIP or RAR file. Only select the files you want to hide, not the picture. Name it whatever you want, i,e. “Hidden.rar”.
Now you should have a folder that looks something like this with files, a JPG image, and a compressed archive:

Now here’s the fun part! Click on Start, and then click on Run. Type in “CMD” without the quotes and press Enter. You should now see the command prompt window open. Type in “CD \” to get to the root directory. Then type CD and the directory name that you created, i.e. “CD Test“.
Now type in the following line: “copy /b DSC06578.JPG + Hidden.rar DSC06578.jpg” and press Enter. Do not use the quotes. You should get a response like below:

Just make sure that you check the file extension on the compressed file, whether it is .ZIP or .RAR as you have to type out the entire file name with extension in the command. I have heard that some people say that they have had problems doing this with a .ZIP extension, so if that doesn’t work, make sure to compress to a .RAR file.
And that’s it! The picture file will have been updated with the compressed archive inside! You can actually check the file size of the picture and see that it has increased by the same amount as the size of the archive.
You can access your hidden file in two ways. Firstly, simply change the extension to .RAR and open the file using WinRAR. Secondly, you can just right-click on the JPG image and choose Open With and then scroll down to WinRAR. Either way, you’ll see your hidden files show up that you can then extract out.

That’s it! That is all it takes to hide files inside JPG picture files! It’s a great way simply because not many people know it’s possible and no one even thinks about a picture as having to the ability to “hide” files. Enjoy!

Watch Hindi, Telugu, Tamil, Malayalam, Kannada, and Bengali movies onilne for free

here’s a list of web sites you can check out to watch only Indian movies from all over the country:
BharatMovies – This site has a large list of movies in six different Indian languages! Some movies are in Divx and some are simply from postings on YouTube. Of course, since most of these movies are copyright protected, you might get an error saying a particular movie has been removed due to infringement, etc. However, there list has quite a lot of recent movies like 15 Park Avenue, 1971, 36 China Town, Aap Ka Surroor, Awarapan, Cheeni Kum, etc. Also, if the first source does not work, make sure to scroll down because they sometimes have another source that might work.

ApnaView – This is another good site for the latest Bollywood movies. It also has movies in other languages, including Punjabi, Malayalam, and Tamil. It also has a lot of Hindi movie songs to watch. There are a couple of other sites out there, but what I like about these two is that there are not thousands of ads pasted everywhere and they don’t have very many pop-ups! ApnaView has pretty good quality movies and most of the links work!

Rajshri – This site has about 290 free films that you can watch, but they are mostly older Indian movies, like Hum Aapke Hain Koun and Hum Saath Saath Hain. Fun movies to watch, but not the latest. They do have the latest movies, but they are not free, you have to pay USD $9.99 per movie to download it. Not worth doing that, but if you’re in the mood for an older movie with good quality, you can check out this site. Also, they have music songs, videos and concerts all for free. You can watch free Hindi music videos to your heart’s desire!

BollyClips – This site actually has movies in Marathi also! I have not seen any other site with Marathi movies yet! Anyway, they also have some of the more recent Bollywood movies, including The Train, Shakalaka Boom Boom, etc in high quality. They also have MP3’s, radio and news/gossip videos. To watch the free movies, click on Full Movies at the top.

Magazine style browsing using Google Fast Flip

Google Fast Flip is a web application in development from Google Labs. It lets users discover and share news articles. It combines qualities of print and the Web, with the ability to “flip” through pages online as quickly as flipping through a magazine. It also enables users to follow friends and topics, discover new content and create their own custom magazines around searches.

To try this web application visit http://fastflip.googlelabs.com/. The page displays thumbnail like representation of the most popular news and magazine sites. With this view, you can see the pages at once alongside other pages.
When you look at the page closely, you can see the image screenshot of each page with the headings displayed as text on the bottom of each screen image. Since each screenshot is an image file, it can not function like the actual page – clicking any part of the image will bring you the bigger image.
With arrows at the left and right side of the images you can flip through the pages like a regular magazine. The images load very quickly and it seems like the images are pre-downloaded by Google’s server – it definitely is quicker than visiting each homepage one by one.
The flipping page/image concept has both its strength and weaknesses. The images load quickly, but the functionality of HTML tags on the page is lost – you will not be able to follow any hyperlinks displayed since it is only a plain image. To be able to visit the source of the page, just click the image and it will open a new tab pointing to the URL of the page.
The site offers other cool concepts like being able to search for any subjects and being able to make a custom magazine on the fly. It has its own voting system that allows users to “like” or “dislike” content. It is similar to Digg’s concept of “dig or bury” to determine popularity. Currently, the service is testing a limited number of publishing partners in the U.S. We hope to see more publishers added in the future.

Saturday, October 3, 2009

BE CAREFUL WHEN YOU'RE USING A public-convenience computer


Additional adapter

New storing device fits at the end of the keyboard cable connecting to the PC specialized to save all typed keys in it !!!!! Mostly could be used in net cafes, exhibitions, hotels and airports therefore be careful especially the people who use the internet in these places to enter their bank accounts online or any other important sites. After you enter the bank account and leave the PC it will be easy to open your account again as all what you have typed has been saved in the Black device. Therefore, you should check the PC for any suspicious piece behind it before using the net in public places for important sites.

Thursday, October 1, 2009

reduce the size of an image yourself

If you want to reduce the size of an image yourself, there are several things you can learn to do on your own.

Change Picture Dimensions
The main way to shrink an image is to lower the picture dimensions. When I take a picture with my Canon EOS Rebel XSi, the dimensions for the photo are 4272×2848 pixels! That’s huge!
If I want to print the image, that resolution is great, but if I just want to email them to someone or view them on a computer screen, then you can adjust the dimensions to something more reasonable, like your current desktop width.
For example, if your resolution is set to 1280×1024, then you can adjust the max width to 1280.
You can usually go to your image editing program and choose Resize Image from the menu. You’ll then be able to adjust the width of the image:
Changing that value from 4272 to 1280 reduced the size of my image from 5 MB to 762 KB! That’s a significant difference. If you feel that 1280 is still too big, you can always go down to 800 pixels.
Change Image Resolution
Along with an image’s width and height, it also has a resolution. This is also called DPI or Dots Per Inch. On a computer screen, the max number of dots per inch is 72.
So if you are only viewing an image on a computer screen, you can change the resolution to 72. Lots of documents that are scanned by office or home scanners will use 150 or 300 DPI.Again, you can usually adjust this value when you go to the Image Resize option from your photo editor:
Of course, reducing the resolution will also reduce the size of an image. So it’s always best to change the resolution to 72 pixels per inch first and then adjust the width and height if the image is still too big.
Change Image File Type
Another option that can reduce the image size is to save it in a different format. For example, my 762 KB JPG file can be further reduced to 659 KB if I save it as a GIF.
Note that saving certain files as GIFs will make the pictures look grainer. Only pictures that don’t use a large number of colors will look the same when you convert them to GIF.Also, the opposite is true. Some GIFs will end up being smaller if saved as JPG files instead. So try saving the file into different formats and see your results.
Change Color Mode and Bits/Channel
Finally, you can convert an image to Indexed Color Mode instead of RGB or CYMK color mode, which can make the images much smaller.
However, the same issue applies here: pictures with a large range of colors will look like you are in Safe Mode in Windows! Going to Indexed Color mode is only useful if you have images with only a few colors, i.e. logos, banner ads, etc.
You can also change the bits/channel down to 8 Bits/Channel and that will most of the time not make any difference in how your image looks.
For my image, going to Indexed Color and 8 Bits/Channel further reduced the image size to 525 KB.
That’s pretty much all you can do to reduce the size of an image, so play around with the different methods and see what works best for you! Enjoy!

How to create custom Run commands in Windows

If you’ve ever used the Run command box in Windows, you probably know you can type certain predefined commands to open programs, etc. For example, if you type “notepad” in the Run box, it’ll open Notepad in Windows.If you type “cmd” in the Run box, it opens the command prompt. If you type “regedit”, it open the registry editor. So on and so forth. Wouldn’t it be cool if you could create your own predefined Run commands?For example, let’s say I wanted to open a particular program when I typed in my name, Aseem, into the Run box? Right now if you type your name, you’ll probably get an error like the following:

Well, with a few simple registry hacks, we can create our own custom run commands to launch whatever program or file we like. Here’s how.

1. Open the registry editor by going to Start, Run and typing in regedit.
2. Now navigate to the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths
3. Now right-click on App Paths and choose New and then Key.

4. Now give the key any name that you want, such as your name or whatever else you like. This will be what you type in the Run box later to launch the custom program. Just make sure that it has a .EXE at the end of the name.

5. Now in the right hand side, you’ll see a Default registry key (string value). Right-click on that and choose Modify. Enter the path to the file that you want to launch.
6. Click OK and then right-click in the white space and choose New – String Value.

7. Name the key Path and the value should be set to the path of the containing folder of the file you just set on the last key. So in my case, it would be F:\My Documents\GotSent\.
That’s it! Now you can go to Start, Run and type in the name you set for the new key in App Paths and your program will launch! For me, I will type “aseem” and GotSent will load up.

Note that you are not just limited to EXE files, you can point to any file type you like: PDF, DOC, AVI, MP3, etc, etc. That means you can create your own shortcuts to documents, videos, audio files, or programs! Enjoy!

Monday, September 28, 2009

Hindu God's in software field....

Brahma -- Systems Installation
Vishnu -- Systems Administration & Support
Lakshmi -- Finance and Accounts consultant
Saraswati -- Training and Knowledge Management
Shiva -- DBA (Crash Specialist)
Ganesh -- Quality Assuarance & Documentation
Narada -- Data transfer
Yama -- Reorganization & Downsizing Consultant
Chitragupta -- IDP & Personal Records
Apsaras -- Downloadable Viruses
Shakuni -- Annual appraisal & Promotion
Valmiki -- Technical Writer (Ramayana Sign off document)
Krishna -- SDLC ( Sudarshan Wheel Development Life Cycle )
Dharmaraj Yudhishthira -- ISO Consultant (CMM level 5)
Arjun -- Lead Programmer (all companies are vying for him)
Abhimanyu -- Trainee Programmer
Draupadi -- Motivation & Team building
Devas -- Mainframe Programmers
Surya -- Solaris Administrator
Rakshasas -- In house Hackers
Ravan -- Internet Explorer WWWF
Kumbhakarnan -- Zombie Process
Lakshman -- Support Software and Backup
Hanuman -- Linux/s390
Vaali -- MS Windows
Sugreeva -- DOS
Jatayu -- Firewall
Dronacharya -- System Programmer
Vishwamitra -- Sr. Manager Projects
Duryodhana -- Microsoft product Written in VB
Karna -- Contract programmer
Dhrutarashtra -- Visual C++
Gandhari -- Dreamweaver
100 Kauravas -- Microsoft Service Packs and patches

Common Computer Problem-4

When I start my computer, I get error message:

"Windows\System32\config\system" file missing or corrupt


Boot using Windows Setup CD and enter into "Recovery Console" by pressing "R". Now Log into windows installation and enter admin password. Now give following commands at prompt:
copy %windir%\Repair\system %windir%\System32\Config
If it doesnt work, then again boot into "Recovery Console" and give following commands:

bootcfg /scan
bootcfg /rebuild
Win XP Tweaks

Common Computer Problem-3

Whenever I start my computer, Scandisk starts running even I proper shut down the PC last time.


A. Open regedit and goto:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager
In right-side pane, change the value of BootExecute to:
autocheck autochk *

B. If the above trick doesnt help then give following commands in Command Prompt:
chkntfs /x drive_name
for e.g., if ScanDisk runs automatically for C: and D: drives, then give following commands one by one:
chkntfs /x C:
chkntfs /x D:

Common Computer Problem-2

Double-clicking any drive opens search option:

That's a virus named as ravmon.exe and autorun.inf
Scan first with a good antivirus [Nod32 Recommanded]
then try this trick.
First show the hidden files and folders options then try this method
1. Go to Start-->run and type cmd then click ok
2. If u want to remove the infected file from c drive then type C: in command prompt and press enter
3. Type autorun.inf and press enter autorun.inf file is opened
4. Now type "attrib autorun.inf -s -h -r" and press enter
5. Now delete the file by typing "del autorun.inf" and press enter
6.Now type autorun.inf and press enter now, u will find no infected autorun.inf file.
7. same way do for all other drives then restart ur pc

Common Computer Problem-1

Task Manager Disabled:

If you are working on Windows XP pro, following steps will help u to enable Task Manager


Click Start --> Run
Enter gpedit.msc in the Open box and click OK
In the Group Policy settings window, select User Configuration
Select Administrative Templates
Select System
Select Ctrl+Alt+Delete options
Select Remove Task Manager
Double-click the Remove Task Manager option
Disable that option

Click on Start >> Run and in the Open box type:
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 0 /f
Click OK.

Sunday, September 27, 2009

The USB Process

When the host powers up, it queries all of the devices connected to the bus and assigns each one an address. This process is called enumeration -- devices are also enumerated when they connect to the bus. The host also finds out from each device what type of data transfer it wishes to perform:
•Interrupt - A device like a mouse or a keyboard, which will be sending very little data, would choose the interrupt mode.
•Bulk - A device like a printer, which receives data in one big packet, uses the bulk transfer mode. A block of data is sent to the printer (in 64-byte chunks) and verified to make sure it is correct.
•Isochronous - A streaming device (such as speakers) uses the isochronous mode. Data streams between the device and the host in real-time, and there is no error correction.

The host can also send commands or query parameters with control packets.
As devices are enumerated, the host is keeping track of the total bandwidth that all of the isochronous and interrupt devices are requesting. They can consume up to 90 percent of the 480 Mbps of bandwidth that is available. After 90 percent is used up, the host denies access to any other isochronous or interrupt devices. Control packets and packets for bulk transfers use any bandwidth left over (at least 10 percent).
The Universal Serial Bus divides the available bandwidth into frames, and the host controls the frames. Frames contain 1,500 bytes, and a new frame starts every millisecond. During a frame, isochronous and interrupt devices get a slot so they are guaranteed the bandwidth they need. Bulk and control transfers use whatever space is left. The technical links at the end of the article contain lots of detail if you would like to learn more.

USB Features
The Universal Serial Bus has the following features:
•The computer acts as the host.
•Up to 127 devices can connect to the host, either directly or by way of USB hubs.
•Individual USB cables can run as long as 5 meters; with hubs, devices can be up to 30 meters (six cables' worth) away from the host.
•With USB 2.,the bus has a maximum data rate of 480 megabits per second.
•A USB cable has two wires for power (+5 volts and ground) and a twisted pair of wires to carry the data.
•On the power wires, the computer can supply up to 500 milliamps of power at 5 volts.
•Low-power devices (such as mice) can draw their power directly from the bus. High-power devices (such as printers) have their own power supplies and draw minimal power from the bus. Hubs can have their own power supplies to provide power to devices connected to the hub.
•USB devices are hot-swappable, meaning you can plug them into the bus and unplug them any time.
•Many USB devices can be put to sleep by the host computer when the computer enters a power-saving mode.
The devices connected to a USB port rely on the USB cable to carry power and data.

Inside a USB cable: There are two wires for power -- +5 volts (red) and ground (brown) -- and a twisted pair (yellow and blue) of wires to carry the data. The cable is also shielded.