Any good free anti virus for computer??

[Tedzed1]

I personally run McAfee, but only because it came with my plusnet broadband package,
before that, I used AVG free http://free.avg.com/gb-en/free-antivirus-download
Along with malwarebytes http://www.malwarebytes.org/products/malwarebytes_free

these two combined used to find most problems.