Which Antivirus do you trust your machine to?

I've had the Kaspersky and must admit that it's a very good one, indeed. However, since it is Russian, it is more suited to CIS countrys (ex USSR) where specific types of viruses are most common. In Europe and in the states, however, i think Norton or McAffee would go best.

HP Compaq nx7010, 512 RAM, PM 1.5 Ghz, 64 MB ATI 9200, 40 GB 4200 rpm, WSXGA (1680x1050)

 

I used to use mcafee. Seemed like it slowed down my computer a LOT. I really liked their firewall though, cause I could track a potenntial hacker. Now I use norton, and I am confused if I should stay with them, since some ppl say norton misses lots of viruses. Any suggestions?

 

I use AVG Anti Virus. It is a free downloadable program. It has done everything that I would expect from an anti virus. It has a auto updater as well.

http://www.grisoft.com/us/us_dwnl_free.php