How to install earlier versions of Windows programs in Windows 7

In Windows 7 most of the programs that run in Windows XP or earlier versions won't work.
Here is the method to run programs in Windows 7.

1. Search for troubleshoot in start menu and click on Troubleshooting from the list (the first one).
2. Under the Programs click on Run programs made for the previous versions of Windows.
3. Click Next button and there will be a list of programs.
4. Select the programs  you want and click Next.
5. Select  the option you want.

Enabling Telnet in Windows 7 and Vista.

1. Open Control Panel.
2. Open Programs .
3. Open Programs and Features.
4. Click the link Turn Windows features on or off.
5. A small window will open with a list of features put a tick for  Telnet Client.
6. Click OK button.
7. You can now start telnet from command prompt.

This trick is useful for networking students.

How to block usb storage devices in your computer without using third party software (other usb devices work,keyboard mouse etc)

This can be done by editing windows registry file

1. Type 'regedit' in search and enter. This will open windows registry edit window.
2. Open HKEY_LOCAL_MACHINE (left side)
3. Open folder named System from its subfolders
4. Open CurrentControlSet.
5. Open services.
6. Open USBSTOR.
7. In usbstor you can see a file named start, open it.
8. A small window will open and you can see number '3' in it, change it into 4 and press OK. That's all.

Hide a file within an image without using third party software

• Compress the file(s), you want to hide, using winrar, say, file.rar
• Let the image to which we want to hide img.rar be pic.jpg
• Copy pic.jpg and file.rar to same folder(let it be in D:\hide)
• Open command prompt and change the directory to hide (ie. change from C drive to D and go to directory hide). You can done it by using following DOS commands

1. Use the command  'CD..'  to go back to parent directory. Use this command until you reach C:\> .    
2. Type  'D:'   in C prompt, that is C:\>D: and press enter.
3. You are now in D prompt.
4. Use CD<folder name> command to go to the folder in which you have the image and rar file (here file.rar and pic.jpg ). Here we type 'cd hide'  in  D:\> we will be in the folder named hide and you can see the prompt like D:\hide>

• Then type   'copy /b pic.jpg+file.rar sec.jpg'  after D:\hide>
• We now have an image file named   sec.jpg   in D:\hide>
• If we open the image file sec.jpg you can see only  img.jpg opened.
• To get the pictures back just open the  file  sec.jpg  using Winrar.