Two easy and FREE ways to protect your machine;
Anti-Virus:
AVG Free Anti-Virus
Firewall:
Free Zone Alarm Firewall
absolutely free, if you want, you can get thier paid versions. No difference here as within the major companies. Sasser worm is a worm, meaning it will sneak its way into your machine. Not as an attachment, just by itself. Which means, your VS probably wont detect it. But your Firewall will block it from your machine. if you dont have either already, GET THEM. Dont wanna hear you bitching later on as to why your machine keep restarting or crashing on its own!