After a successful log out I get the usual "Logon" dialog box but it is replaced with the "Workstation Locked" dialog box after about 5 seconds.
The system seems to think that the last successful user logon is still logged in and has locked the machine.
If I enter the last logged on user password or administrator password I can then get a normal "Logon" dialog box.
A cold reset gives me the same result.
A delay in logging in produces the "Locked Worksation" dialog box.
Any help would be appreciated.