I don't know what you have in virus and spyware protection but I can recommend Panda. It has a combination anti-virus and anti-spyware system, plus a heuristic system (that's what they call it, anyway) that spots viruses that haven't been identified. I thought I had a virus the other day but Panda apparently isolated it before it got anywhere.
A number of their software packages also include a firewall, which I can also recommend. I haven't had a serious problem with a virus or spyware since I went over to it.
Nan
