To answer both. Yes, i moved it while running limewire (but havn't tried safe mode yet, i'll try that next). And yes, i am loged in as the Administrator, there are no other users other then myself.
EDIT
I've now also tried safe mode, loged in as administrator. And i still can't move the file, or even delete it. This is starting to worry me. I had 10 gig's in that folder, and it's still missing from my harddrive. Which means i might have 10 gigs of deadspace now.