I have one user who on their own computer (XP Pro) with their own login credentials gains access to shares on a Windows 2003 server that they do not have permission on. This user for example can access the computer dept share - (she should not be able to - I checked the security and sharing) If I user her credentials to log into another machine - she can't access this folder, it works as expected. It is only when she logs into this one computer, she does not have access to certain shares that she should, and she has access to folders that she should not. If any other user logs onto this machine it works as expected. Only her username on her computer has this issue. Maybe the user profile is corrupt on this machine?
We have one domain in a mixed 2000 - 2003 environment.