I contracted vbs.loveletter.as through Kazaa. It didn't do any damage that I can see, because it was automatically quarantined. But, my computer seems to be running slower and performs more "illegal operations" then it did before. What exactly does the worm do? Are there any programs other than anti-virus stuff that can better protect my PC?

BTW, I checked Google, and all I got was a lot of mumbo-jumbo I couldn't understand. I don't know too much and I don't pretend to be 1337.