Perhaps your computer is running slow?
It happens, pc's and macs get virus' (don’t believe the hype about macs). The majority of anti-virus software simply doesn't catch certain types of viruses. What they don't catch opens the door for more severe types of viruses. It’s sad how poorly most anti-virus software perform.
If you get infected we can help you disinfect windows, web browsers and your files. We use a two part scanning method that searches for and removes root-kits and hidden bombs. Then we attack the file system to remove active infections. Once free of infections we inspect your web browsers for hidden threats, clean out temp files, install additional protection software and give your machine a tune-up.