When ADU is installed on my laptop running XP with several user accounts it disables fast switching and I can only log on with one account. Removal of the ADU solves the problems. Is this a known bug or is it something my end. How do I work round it? If at all?
What you are seeing is a expected behavior. This is by design. Due to Microsoft limitation in the fast user switching, whenever Microsoft detects any 3rd party gina file, it automatically disables fast user switching.