USER LOGON PROBLEMS

My computer is setup with four different accounts. Two
of the accounts are administrator and two of the accounts
are limited users.

When I try to logon to one of the admistrator accounts,
the computer loads windows settings and the windows
background, but then stalls. It will not load up the
program icons.

I can reboot and logon the one of the limited accounts
and the logon works fine.

Any suggestions??