If you’re having trouble booting your Windows 7 or Vista computer, there’s a good chance that the Boot Manager is missing or corrupted. You can try to fix the problem by following these steps:

  1. Start your computer and press the “F8” key repeatedly until you see the “Advanced Boot Options” screen.
  2. On the Advanced Boot Options screen, select " Repair Your Computer ."
  3. On the “Repair Your Computer” screen, select “Boot Manager.”
  4. If you see an error while trying to boot your computer, click on the “Fixbootmgr” button and follow the instructions that appear onscreen. ..

If you don’t have one, you can create a Windows Vista repair disk using our guide.

Boot off the Windows Vista DVD and then click Next at the first prompt:

You should see a link in the lower left-hand side for “Repair your computer”

The installation process will attempt to find your Vista installation directory. If there’s more than one in the list, select the correct one and then use the Next button again.

Click the first link for “Startup Repair”

The installation process will repair the system, and then prompt for you to reboot.

Alternatively you could have chosen the Command Prompt option instead, and use the following command to fix the boot options only:

At this point you should be able to reboot your computer, remove the DVD and everything should be working. If not, then head over to our forums and ask your question there. We’ve got some top-notch geeks over there!