I have found a lot of free anti-virus services to help keep your computer clear of viruses. Buying the product usually unlocks more options and a better more efficient scan, but free editions are sometimes all you need. Below are a list of free anti-virus programs to help you with the fight.

Panda's ActiveScan Pro is a trial version for 3 months. This is a free anti-virus trial that should help you fight against viruses until you can buy an anti-virus.

I've always used this service when a friend or family member needed an anti-virus solution. Panda's ActiveScan has always found the viruses that have infected my computer. I believe this to be the best free anti-virus you can find.

I love McAfee and use them to protect any computer that I have. I urge everyone around me to use them and most of them are very satisfied with it's simplicity and effectiveness. Below is a link to a free scan that they now offer off their website, go see the power you were missing out on!

I have heard good things about Trend Micro but have never used them (not even the free scan). If Panda doesn't remove what your looking for then I would try this one.

I have never used this service, and never tested the product. It was a security link that I have stumbled upon. I have never heard of AVG or used their services. Use this with caution until I can test it out.