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Various registry problems after removing "Windows 7 antivirus 2012"
My roommate got a particularly nasty version of the windows 7 antivirus 2012, it even installed a fake version of Malwarebytes. I was able to remove it by starting in safemode, killing it's process and running spybot followed by an avast full system scan, then a boot time scan. Now several scans and restarts later all scans are coming back clean (sfc included).
That being said, after the malware was removed .exe files were broken, windows firewall wouldn't start and the service was missing from the services list [BFE was also missing] (manually fixed the registry via various posts on this forum, these are working again). The netbook still won't connect to the internet, and I suspect windows update is broken as well. The malware also did something to Avasts realtime web shield, the shield is stuck off, attempting to turn it on does nothing. While the malware was still on the computer clicking the 'turn on' button in avast would trigger a popup from the virus (not an avast popup, a popup from the malware itself). All of the system restore points have been corrupted as well.
So, I'm not really sure what to do next... I would usually do a clean install of the OS in a situation like this, but his netbook doesn't have an optical drive (it would be easy enough to back up all his files, if there is an alternative method for reinstalling the OS...?). Any advice or suggestions would be greatly appreciated.
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