I use Avast Pro 4.8 on some PC with Windose XP SP3. Last Thursday, September, 23, at one computer after Avast update, Windows became a very, very slow. In the task manager there was no active process running, hard disk uttered rhythmic sounds. After 10-15 seconds after the restart the computer in normal mode situation recur. But the computer has successfully booted in safe mode. I had uninstalled Avast (in safe mode), the problem disappeared. After that I re-install Avast and new problems do not arise.
Today I turned on another computer (it was a long time off), there was an Avast update too and repeated the problem - a very, very slow work Windows, nothing can be done. Solved the problem by Avast reinstalling.
Anybody else experiencing this problem?