clk77,
Sorry to say, but after running the Avast SS with the MS screen passworded, I could not reproduce your problem.
I could get the screen to "hold" for awhile when I added in very large zip files, but could not get it to freeze. I was also able to "suspend" the SS movement by lowering the "speed setting".
Check your "speed setting" for the screensaver. As an afterthought, if the setting is really low (slow) and the scan hits a large file, then it could appear to "freeze".
Culpeper,
Thank you for your input.