Using Avast! 4 with Outpost firewall. No problems. AVG sucks on my system (W98, OE5). Causes all kinds of hangups with the OE plugin and OE. Most people don’t have this problem with OE and AVG but it isn’t uncommon to hear about it. Also, AVG email scanner seems to scan the entire email folder almost everytime I go back to it. I think that is sort of lame. I uninstalled AVG and opted for Avast simply because it is more stable on my machine.