Avast 5 on my pc, has a slow start-up, which takes about 5-10 mins to load up on an average day, and also I have periodical slow IE browsing. I've updated Avast 5--to it's most recent build(update).
My pc: Dell Dimensions 2400
Intel PENTIUM 4
Mem:128 mb
HDD: 80 GB
Not sure, if I should upgrade the memory, maybe it's the reason--or not.