Dancing David
Penultimate Amazing
The fake anti-virus on my mother's machine disabled the task manager, AVG, Ad-aware, Spybot, and Safe Mode. That's right, I could no longer boot her old HP into safe mode. It was crazy. The harder I worked, the more locked down the machine got. I hadn't been that frustrated with a virus for long ass time. Hell, I hadn't had to fight off a virus for a long ass time. It didn't disable Malwarebytes, but Malwarebytes couldn't remove it all either. Oh, and I couldn't get the regedit to run. It would crash the computer.
Nuked it, it works fine now.
I got a netbook returned with a different version of the fake anti-virus as well. This one had also disabled the task manager, though not as completely. Still, I don't get paid to remove that crap, so it's going back to Dell for full restore.
Yup that is a nasty one, if it disables safe mode, especially if you can't regedit to turn it back on. I have seen the ones that disable task manager and safe mode but not the regedit. The one I encountered with the sage mode issue required regedit to fix.
It probably would have blocked a download of Combofix as well. About all you can do is use a boot disk to recover the files.