I needed to "repair" my Windows 7 Home Prem 64-bit (OEM) because optical drives could no longer write. sfc /scannow found nothing. So I chose upgrade in place because the idea of re-installing everything would be too disruptive and shouldn't be needed for this kind of problem. I had Kaspersky AV turned off. I was "upgrading" within Windows, as suggested here in Brink's tutorial and would not change versions.
After finding all the 550,000 files the upgrade process started to expand Windows files. The computer restarted right away after the beginning of that process but it went to the log-in and put up a message stating that "This version of Windows could not be installed." Nothing has changed on my mobo since the original install except a flash of a new BIOS version from Gigabyte. In fact, recently (but before the BIOS was flashed) I did re-install Win 7 from scratch (clean) and that went off without a hitch. As suggested in the message box I looked at the "Upgrade Adviser" pages but nothing seemed to be about this issue: same Windows 7 and same install DVD as its last clean install.
Any suggestions? I had considered fixWin before doing this, but sfc /scannow seemd like the stongest tool in its arsenal and I already did that and found nothing.
Thanks, in advance, for any suggestions.