Unfortunately, with a fresh Windows XP installation from scratch, with a repartitioning and reformat, after I install Avast, Windows XP will lock up when at the desktop and thus I’m forced to push the reset button on my PC and risk HDD data corruption :(.

Avast will cause Windows XP Explorer to lock up and all I can do is move the mouse pointer. Even Task Manager won’t respond and all mouse clicks are ignored.

The above symptoms are with Windows XP Pro SP1,
Via AGP driver 4.30a and Catalyst 3.2.

The PC has an Asus A7V8X-X motherboard with BIOS 1005, Athlon XP T-bred 2000+, 256 MB Kingston PC2100 DDR SDRAM and a Radeon 9000 Pro.