I have a problem where a user logs on (usually a Monday morning following a full power off) and the logon script runs and maps two drives. When he opens My Computer or Explorer one of the mapped drives doesn't show but it has mapped because if you Disconnect Mapped Drive it is there, if you 'Save As' it is there and if you attempt to map the drive again to the same letter it says Drive Letter in use. There are no abnormal entries in the Event Log. i can't find anything similar from web searches. Has anyone come across this problem before? thanks for reading!