Online Scanning for free

I  was tooling around with my Brother's home computer over the holidays, and noticed that there may have been a good bit of malware installed (thank you BearShare!).

I was about to run a scan using Symantec, then my other brother piped up and said:

Why don't you use Windows OneCare?  It's online and free!

I was confused, befuddled, and intrigued!  There's a free scanning tool from Microsoft?  And my little bro' knew about it and I didn't? Something isn't right with the world.

Turns out it's quite useful and pretty effective; check it out:

http://onecare.live.com/site/en-US/default.htm