Microsoft Security Essentials.
Lightweight, surprisingly good, and doesn't interfere with everything like the other free ones do.
http://www.google.com/search?q=microsoft+Security+Essentials
If Microsoft claims it isn't for your region, just download from one of the other links and let it update itself.
Lightweight, surprisingly good, and doesn't interfere with everything like the other free ones do.
http://www.google.com/search?q=microsoft+Security+Essentials
If Microsoft claims it isn't for your region, just download from one of the other links and let it update itself.