Infinite Applying User Settings

There is an application that installs just fine on most of our Windows XP
Pro SP2 workstations. It is called ClearCase. (Please no comments about
ClearCase being good or bad. I'm stuck with it.) On a few workstations,
however, ClearCase will install apparently successfully and then tell us
that a reboot is required to finish up.

The reboot makes it to the "Applying User Settings" message and hangs. We've
given it the opportunity to apply them for many hours (overnight). The only
recourse is to power down and try booting again. (Unfortunately we
worker-bees are not given the ability to go to Safe Mode. Requires the local
admin password which we do not have. )But our PC support people can and have
tried with no better luck. (Actually they can get on and remove ClearCase,
but cannot fix the installation.) We're working with the ClearCase vendor
but they cannot duplicate the problem.

Is there a way that a user with admin (domain based) can interrupt "Applying
User Settings" and see what is hanging?

Oh yes, we've tried logging on as a brand new user to the workstation and it
still hangs.

One other tidbit, this happens when installing the trio of Visual Studio.NET
2005, Dassault Systems RADE (Rapid Application Development Environment), and
ClearCase. We've tried changing the order of install, but when all three are
installed, hangs-ville.

Even more confusing is that for some of the workstations, repeating the
exact same installation order will result in a successfully ClearCase
install.

Brian Bygland