I cancelled cos it was scanning 2 x 20GB HDD and I wanted to get on the net quick! No reported errors though.
I'm still running Sophos AV and zone alarm in the background.
Celeron 500m, 512mb RAM, XP Prof sp1.
If I'm quick, when I boot and as soon as the avast icons appear on the taskbar, if I quit I can now get use of my PC.