Hi Skorp, say which Internet browser, if any, are you using when this happens?
I had tried the MS IE 7 Beta 2 browser, and something about it was causing Zone Alarm, and Avast! to both shut down, however, I never got any error messages, or any other kind of notice as to what had happened.
I uninsulated that sucker, and so far It hasn't happened again.
Good luck.
♥ Wendy