This is a interesting piece of info that you can use to lock your
work-stations without using the combo key "CTRL- ALT- DEL"
If CTRL-ALT-DELETE seems like too much of a hassle, try this instead:
1. Right click an empty spot on the desktop, point to New and click
Shortcut.
2. In the Create Shortcut dialog box, type the following into the Type the
location of the item text box:
"rundll32 user32.dll,LockWorkStation" // remove quotes while typing
3. Click Next.
4. In the Select a Title for the Program dialog box, type "Lock Desktop" in
the Type a name for this shortcut text box.
5. Click Finish.