wow... a lot of people use a lot of good stuff...
oh well, i use the following on my "main PC"
Antivirus-Avast! Pro 4.7 (Cheap enough, and i like the extras)
Firewall-Windows, ProtectX, ZoneAlarm, and McAfee
AntiSpyware-Spybot, Spysweeper, Ad-Aware, XPTools, ZeroSpyware
yes, i am what one would consider paranoid, but i log in remotely over the net into work, and that means a bunch of open ports, plus when i get on games, that's more ports, and when i FTP for synchronization, that's even more ports, so a lot of security is a neccessity.
Bit Defender 10
Jafo, i used Bit Defender 10, and it took a lot of my resources when i had it running full-bore, i'm on a decent machine, and it just seemed to lag it down when i kicked it up.
is your machine just that much better than mine, or is there some weird thing with my box?
Specs for PC are- Athlon 64 3400, 2gigs DDR400, 300GB 7200 16m, ECS board, Radeon x850xt PE.