|I tried avast and wasn't to impressed.|
Read the reviews for Nod32.I started using it and its been great.It only runs 2 processes and has updates almost every day.
Asus A8V Deluxe Rev.2
AMD Athlon 64 3800+/Newcastle
1 Gig Corsair PC3200
ATI Radeon 9800Pro/ATI Silencer 1Rev2
Sound blaster audigy gamer
Via 4.55 Drivers