I just installed NOD32 and...

[Scream And Fly]

Wow. What an incredibly great and light application. I'm a longtime McAfee user and I really saw the light this time. My system boots about 15 seconds faster with NOD32 than it did with McAfee installed! I suppose this and Windows Defender (in addition to my router) is good enough, right?

 

[Moogle Stiltzkin]

Yeah Nod32 is pretty light weight and good.

Another is kapersky but i kept away from it after Vista, cauz there was some review it didn't have full vista compatibility yet.