Using the Home Repair Tool
Follow these steps:
1-Reboot and configure the BIOS so that the first boot device is the DVD. Refer to your computer manual for how to do this.
2-Insert the Windows 7 DVD in the drive and reboot the system.
3-When the message Press any key to boot from CD or DVD, press ENTER.
4-In the Install Windows window, click Next.
5-Click the Repair your computer link.
6-When the following message appears on the screen, click Repair and Restart.
Windows found problems with the startup options of this team. Do you want to apply repairs and restart your computer?