We can use 'net user' command to control the time a user can access this computer.

Click 'Start' - 'Run', type in 'cmd' and then press 'ENTER' to open the dos console.

Type 'net user' and then press 'ENTER'.

All the user accounts on this computer will be displayed.

The following is a sample:

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\Documents and Settings\ Administrator >net user
\\35341B67CC434F6
-------------------------------------------------------------------------------
Administrator      her1          good
He1              myuser              letgo
Tomorrowusr

If we want to control the time that user He1 can access this computer, we can enter the command:

net user He1 /time: M-Th,4pm-8pm; F-Su, 8am-8pm

This command limit the time that user He1 can access this computer at 4pm-8pm, from Monday to Thursday and 8am-8pm, from Friday to Sunday.

If we want to clear or remove all the limitations to this user, we can enter the command:

net user He1 /time: all