@Sakonosolo:
Any bluescreens at all technically is not acceptable because it means a fatal error which kills the OS. But like I said, if it isn't damaging anything to your knowledge and isn't that much of a bother (and you can't find a way to fix it) then I'd say just leave it.
That's kinda good to know. But these do happen, I remember running across these once in a blue moon on pretty much every computer I've owned. Not this particular error, just saying it happened to me before.
Just in case it was this virus (Backdoor Rustock), which they say is a low level threat anyway, I did a quick scan with avast and found nothing. Might just check system restore to see if the bastard's not there, but I doubt/hope not. A bit annoying that the guides that mention it only reffer to Norton when talking about diagnosting this thing.