Windows 2000: The system attempts to unload the profile 60 times at 1 second intervals.Also, configure the NTFS permissions on each user's profile folder so that he/she has full control of it but not other user's profile folders. For years we have had problems with Roaming Profiles in the Windows Environment.
This problem in code can be caused by improper coding either in Microsoft software or 3rd party software (e.g. With the information provided by the system there is no way to find out what software needs to be corrected to allow profiles to unload.
Windows NT4: The system gives up immediately on failure to unload the profile and the (roaming) profile is not reconciled.