This is going to start a bit or arguments with other members, but my suggestions is Avast, it monitors everything from P2P to Internet to Viruses, it's completely free, and it's a pretty small footprint (doesnt use alot of memory)
This is going to start a bit or arguments with other members, but my suggestions is Avast, it monitors everything from P2P to Internet to Viruses, it's completely free, and it's a pretty small footprint (doesnt use alot of memory)