Good free antivirus?

Can anyone recommend a good free antivirus? I was using AVG 7 but they are requiring an update to avg8 which will not run on my version of TinyXP for some reason. Any help is appreciated.

i use avg. but i have heard good things about avast.

I use AVG and Avast. They work better than Norton and McAfee.

Avir Antivir… Check the anti virus ranking!

AVG is ok

But they are going to discontinue their free service and you gotta upgrade IIRC