A new Internet worm was released this past weekend, and it’s infecting computers at a fast and furious rate. The Sasser worm does notrequire e-mail or user interaction to infect your PC — all it needs is an unprotected Internet connection. So if you’re running Windows 2000 or XP, make sure you have your firewall up. Check here for the Microsoft security patch that fixes the problem. If you’re already infected, a removal tool is available here.