Um, not quite. I lock my stations (at home and work) and the screensaver/power mgmt features kick in like usual. Locking the station shouldn't kick you out of the Win2K code or anything like that. It just lets you lock out the kb/mouse and blank-out the screen with a login prompt (that usually drops to the screensaver, then to any power saving modes that you have set). On my machines, I do have the screensaver set to lock the station when it kicks in, but I usually lock the station manually.
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Regards,
clutch