If you can get into safe mode, have these tools prepared with updated definitions or use safe mode with networking:
Adwcleaner,
Malwarebytes Anti-Malware, and
Emsisoft Emergency Kit (thinking ahead, EEK takes a long time to update definitions but is worth running). If this combo doesn't get it, activate the free trial of
Hitman Pro. Very few nasties survive these tools and if they do, don't waste any more time cleaning and just reload the OS.
edit- sorry you were in the process of reloading already, just realized. So yeah I have had
Comodo rescue find stuff others don't but they all find things each other won't. It depends on how many scans and second opinions you wish to invest time into. When you backup the files, they won't likely be infected so you can safely reload and then scan the files through the new installation.