I thought I'd scan the migwiz.exe file whilst in the suspect folder, and lo and behold a threat was detected. The description was Win32:Malware-gen, which after doing a quick Google search doesn't look very encouraging!
If you had excluded that folder as I suggested in the above instructions then you shouldn't have found anything.
The avast Win32:Malware-gen is generic signature (the -gen at the end of the malware name), so that is trying to catch multiple variants of the same type of malware and is a fine balance between detecting a new variant and detecting something valid as infected.
So a search on this malware name is unlikely to reveal any useful 'specific' information on what it actually is.
Unfortunately your URL to the VT results doesn't work, so how many detections and what detected it (only avast and gdata, etc.) ?