What are you running for anti-virus and anti-spyware/malware programs? If it's Norton for anti-virus, IMHO Norton is useless and costs too much anyway. I called my local ISP one night for a tech issue and the tech that I got on the phone recommended me to uninstall my Norton and download Avast for free. He said he was using it, that it worked excellently, and that it was for free. So I've been using that for anti-virus now for 2 years and have had ZERO issues. As far as spyware/malware, I use Super Anti-Spyware and that also works very well for me and is free as well. Here are the links.
You have nothing to lose to check these out. And I would confidently tell you that both of these programs do what they say very well. They have for me. )-(
http://avast.com/ You want the free Home Version.
http://superantispyware.com/ You want the Free version here also. Best Of Luck