my pc contracted the blaster worm not so long ago, and ive removed all trace of it (i think!) but ever since, when online it runs fine for a few minutes or so and then suddenly gets VERY slow and eventually (roughly 15mins) it restarts with no error msg,etc. ive found that after a few repetitions of this (connect,slow,reboot) it seems to be ok, but its extremly annoying.can anyone suggest fixes? 