Policy or Profile Screw-up

I have somehow screwed up the policy on a Windows 98 machine. The machine has cached a profile restricting everything. I can’t do anything on the machine. Even when I logon on as the domain administrator.

Is there a way to remove the user.dat file in dos (it seems to be invisible, because I can’t see it.) Or edit the registry to not apply the policy.

I have already used DOS regedit to change the HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Update Key to “00”, so that policies won’t be applied, but they still are.

I don’t want to have to reinstall the operating system.

Any Ideas?

Preston