So your Windows PC is running slow, crashing, or acting funny. You're sure there's no hardware issues. This leaves one big suspect: malware. When XP was ruling the roost, reinstalling operating systems once or twice a year was the norm for a lot of users. However, installing a fresh version of Windows is not always practical or possible. So what do you do? Put on your geek cap, be ready to bring a bevy of anti-virus hammers on the malware infecting your system, and read on!