Cannot use help and support on XP client

I know this is slightly off topic but not sure if anyone
else has had this problem.

When I log onto the XP client as a local administrator I
can use the help and support but if I log on as a domain
user as part of the domain the help and support just hangs
and I get Application hung errors in the event viewer.

Any ideas please

Thanks in advance.

Best Regards
Antony