Really, I am the person who uses this computer most often, so I probably will stick with my account.
Now I run the SetupDiag tool because I get the same error yet again... will update this post once I get results.
UPDATE 1: Is it supposed to take long on "processing rule: FindDownlevelFailure." or is that actually the end of the process?
UPDATE 2: Seeing as the program is actually using system resources, it might actually be doing something...