HOW TO UNINSTALL WINDOWS 7 SERVICE PACK 1 USING COMMAND PROMPT

                   It's not recommended to uninstall the Windows 7 SP1. If you want to uninstall it because of some hardware problems, Then it's the betterway to uninstall, Follow the steps given below

1. Click the Start button , and then, in the search box, type Command Prompt. 
2. In the list of results, right-click Command Prompt, and then click Run as administrator. Administrator permission required If you're prompted for an administrator password or confirmation, type the password or provide confirmation.
3. Type the following: wusa.exe /uninstall /kb:976932 
4. Press the Enter key.

That's it.. you have done with it ..

Note:

       This is the Method recommended by Microsoft