Have a look on your pc for something called "winupdates".... do a search/run your virus checker/whatever you have. It hides in "C/programme files/winupdates" but you may not be able to actually find it there. Do a Google for winupdates if you're concerned. It could be in there, don't say I haven't told you. Something called Gaobot worm is causing it, brought on by Limewire p2p.