Question: Can I upgrade a corrupted OEM copy of Windows Vista to Windows 7?
The following method doesn’t require the second install of Windows 7, so it should be much faster than going through two installs to verify owning the previous version. Go through the complete install, then:
From the command prompt or start menu, type regedit to start the registry editor, then navigate to the following location within the registry:
Change the MediaBootInstall key from
From the command prompt, type
slmgr /rearmand wait for the confirmation dialog box.
Reboot your computer and activate normally.