Here's a link to a microsoft security scanner that will run alongside your existing anti virus app.
http://www.microsoft.com/security/scanner/en-us/default.aspx
if your security app is about to expire you shoud consider using the free Microsoft security Essentials which comes very highly rated.
http://windows.microsoft.com/en-GB/windows/products/security-essentials
http://www.microsoft.com/security/scanner/en-us/default.aspx
if your security app is about to expire you shoud consider using the free Microsoft security Essentials which comes very highly rated.
http://windows.microsoft.com/en-GB/windows/products/security-essentials
All my cam computers run Microsoft Security Essentials. And I installed it on my In-Law's computer because it is so light weight and does everything in the background. The company I work for has it installed on over 1000 computers. It's free and it is good.