Login Problem

A user on a Win2K Domain has been having problems when logging in and I wonder if someone has come across this situation before. Here is the scenario:
THe user logs on (username and password) and the loading your personal settings dialog pops up, followed by a blue screen that goes no further.
To fix the problem, I logged on to his computer (I am a member of the local Admin group) and copy his profile to another location, then delete the troubled profile and then have him log in, which is successful. However, when he shuts down and tries to logon, the same thing happens and the process of copying the profile starts all over.

Does anyone have a suggestion as to how I can stop this from happening once and for all. Incidentally, this user has loads of icons on his desktop.