How to Fix Windows Vista Registration File

1. Open the 'Start' menu and type 'cmd' into the 'Search' box.
2. Click on the 'cmd' program that appears at the top of your Start menu.
3. Type in 'slmgr.vbs -ipk x' and press 'Enter,' where 'x' is your correct Windows Vista product key.
4. Type in 'slmgr.vbs -ato' to re-register the correct key, fixing the registration file.
5. Reboot your computer.