just yesterday as i came back from school, i got to my BT machine, and i get like 10 kdesktops, nepomuks and who knows what else, reported by top.
it starts at 400MB and grows to full swap and ram usage.

i got into the recovery console and run the dpkg, clean and i cant remember what else.
i am on the brink of reinstalling backtrack, but i really do not want to do that. have i gotten a worm, or something? i cant remember opening anything suspicious to say the least.
should i get an anti virus next time?.

any help is appreciated