Kaspersky found a few files I cannot get rid of...including one rootkit
This one obviously is Avast quarantine - renamed with that .vir extension. You ought to be able to empty the quarantine /delete it with no problem.
C:\Program Files\Alwil Software\Avast4\DATA\moved\iaStor.sys.vir Infected: Rootkit.Win32.Tdss.ai 1
The others don't bother me - HP bundles that Weatherbug and it's merely mild adware.
Your MBR looks OK - I'm not seeing anything in the logs. 'Course, I might be missing something or this particular malware family has evolved yet again.
-- If you are still having issues, perhaps you could try a fresh run of Combofix. If you do that, delete your old copy and download a fresh one to the Desktop and run it from there.
PP:)