I'm on XP SP3 though... I do use video thumbs actually. So for now, it seems we both have networked drives and video thumbs in common, so it's time to start looking at these two things. I'm around for the rest of the day and I will be doing some extensive testing. I have some ideas on where to start looking, so hang on a bit. I'll keep you posted. :UPDATE: Well I looked at a lot of stuff, watched processes, disabled and enabled stuff, and found nothing. I'm starting to think this is related somehow to .net framework 4, it's the only real update that's happened as best I can recall. My last option is to try and uninstall that and see what happens.