I'm now working from a computer still using Avast 6. My other computer, which is the problem, operates on Windows 2000 Professional. It was working just fine late last night. When I booted up this morning, I was prompted to press the FINISH button to complete the installation of Avast 7, which is not something I intentionally intended to install--I assume this was automatically downloaded. Problem is, whether I press the finish button or not, my computer is frozen and I can't do anything except to press the reset button, boot up again, and the computer freezes up again. I should also mention that Malwarbytes is installed on that computer. So how do I get out of this? My computer is inoperable.