I've had to deal with this problem on quite a few Vista machines but never found an answer that works. There is advice to check a registry setting but that has never fixed my problem.
Even Microsoft seem to throw up their hands and avise a clean installation in
but surely there must be some way of resolving this without such drastic measures.
Currently I have a laptop stuck on a black screen with just the cursor movable and if anybody can help out I would appreciate it..