If the PC has more than one operating system, you’ll have to select the Windows 7 installation when prompted to do so.
If you don’t see this option, see the “Using a Windows 7 Installation or Recovery Disc” method.
Boot the computer while holding down the F8 key as you did earlier. Select Repair your computer and press ↵ Enter. Select a language and click Next. Select System Restore. Follow the on-screen instructions to select a restore point from when the computer was last functioning properly.
If you don’t have a Windows 7 DVD or system repair media but have access to a working computer with a DVD burner, you can use it to create a new installation disc. See How to Create a Recover Disc in Windows 7 to learn how. You’ll need your Windows product key to do this, and you’ll usually find it on a rainbow sticker somewhere on your PC.
If you are not prompted to boot from the DVD, you probably need to access the BIOS and make the DVD drive the first option in the boot order. See Change Computer BIOS Settings to learn how to change the boot order.
Reboot the PC from the DVD as you did a moment ago. Select your language and click Repair your computer. Select your installation and click Next. Click System Restore. Follow the on-screen instructions to select a restore point from when the computer was last functioning properly.
Reboot from the DVD again and select your operating system. Click System Image Recovery on the “System Recovery Options” screen. Follow the on-screen instructions to reinstall the operating system.
