Avast Antivirus 5 is bad times.

Avast 5 is bloated, busy, pushy and did a number one of my clients PC’s.

Here’s some fun quirks:
Firefox runs super slow, and barely loads pages at all.
The interface is NOT viewable in full via MCW5601, just a heads up.
It adds a UAC like feature to EVEN an XP pc, that also, is not viewable remotely.

This was all done on a 2003 ish PC and it sucked.  I read many others posting that their computer was newer, faster and better and Avast Antivirus 5 was still a pain.  Version 4.8 still works, but they will hound you until you ungrade.