If you're newly installed window 7 is giving you trouble at the start up first simple way will be to try out SYSTEM RESTORE. The problem with it is that you may not be able to preserve newly installed programs and system drivers. If you want to save all your current information you will have to go via REPAIR INSTALL route.

Here are steps you need to follow to Repair install Windows 7

1. Start the Windows 7 and log on to administrator account

2. Disable the 3rd party antivirus, firewall or any such security program. (They may interfere with the repair upgrade installation of Windows 7.

3. Load the Windows 7 installation DVD into the DVD drive, and Run the Setup.exe from option in the Auto play window

4. Next click on the Install Now button to start the installation

5. Uncheck I want to help make Windows installation better box. Following this to get the latest updates for installation option click on the button Go online

6. Windows 7 will search online to install any available installation updates.

7. Look for the I accept the license terms box and check it, and continue

8. Follow it by clicking on the Upgrade option. Now it will start the installation of Windows 7

9. After the final restart a blank screen appears

10. Type in your Windows 7 product key number

11. First uncheck the Automatically activate Windows when I'm online box at the bottom. After this go to the Next button.

12. Now click on the Use recommended settings.

13. Choose your Time Zone. Set the date and time setting and click on the Next button.

14. Click on the option for your computer's location to select the correct network location typesetting that has to be applied for the location.

15. Now Windows 7 prepares your desktop to startup

16. It's not over yet. You must insure that you are not missing any user file

17. In case some user's files are missing copy those from the hidden protected operating system - C:\$INPLACE.~TR and C:\WINDOWS.~Q folders.

18. Next click on the Clean up system file button to run disk clean up.

19. Refresh the Windows Experience Index (WEI) score.

Finally your job of repair work is finished .Restart the computer and start enjoying your experience with window 7