Yep, head over to Avast. Go to
www.avast.com and download their antivirus program. It's free, the updates are free and works like a charm. Then, run your ass over to
www.comodo.com and get their free firewall. It's free, updates are free and nothing can get in or out without you knowing about it. While you are there, they have a program for Malware.
Yep, you need it. Can't beat the price...Free.
And if you don't have anything to protect your email, they got a kick ass program for that too.
They have anti-virus but because I have not used it, I can't recommend it but this other stuff I've mentioned, I'll put my rep on the line for it.
-VG