Hi, wben. Thanks for writing. I am on Windows 7 SP1. I tried to do the Windows 10 upgrade recently, to get away from the looping Windows Update, but lo and behold, after downloading I was prompted with an error, saying the installation failed. This must be attributed to Windows Update yet again, because it popped up during the preliminary installation.
I have supplied you with a link around 10 mb, it contains the .txt which says nothing is corrupted on my end. "Done" means went through. MS' own FixIt which fixed some registry corruption on the first run and on the second recorded issues with the update database bit was unable to fix that!