Freddy, you might consider an OS like Linux that is less virus-prone for your surfing needs. The vast majority of viruses target vulnerabilities in Windows, so if you're running something else they have nothing to infect.
I find that using Linux is preferable to paying protection money to anti-virus companies whose products always seem to be one step behind the bad guys. I've had more problems caused by anti-virus software on Windows machines than I have ever had with viruses.
With Linux, zero problems.
