Lock Workstation with a single keystroke

Step 1. In Windows 2000, right-click an empty area of the desktop.Step 2. On the context menu that appears, click New, then click Shortcut.
Step 3. In the Create Shortcut dialog box, type the following command (this command is both "space-and case-sensitive"):
rundll32 user32.dll,LockWorkStation
Step 4. Click the Next button.
Step 5. In the Select a Title dialog box, type Lock Workstation or a title of your own choosing. Click Finish.
Step 6. A new shortcut appears on your Desktop. Right-click this shortcut, then click Properties.
Step 7. Place your cursor in the Shortcut Key box to define a key combination that will run this command. If you press any printable key A-Z or 0-9, the defined key combination will be Ctrl+Alt plus the key you pressed. You can also hold down Shift+Alt or Ctrl+Shift plus a printable key.
Here's a secret for a faster shortcut, however: Use a symbol key on your numeric keypad. For example, if you press the minus key (-) on your keypad, Windows will use this as your shortcut key without requiring Ctrl, Alt, or Shift. Then, when you want to lock your workstation, just press your numeric minus key. This key is easily reached in the upper-right corner of your keypad, but it isn't a key you're likely to hit accidentally.
Step 8. After you've selected your shortcut key in the dialog box, click OK.
Step 9. Drag the shortcut icon from your Desktop and drop it on your Start button.
You can now lock your workstation by pressing your chosen key combination, running the shortcut from your Start menu, or running the shortcut from the desktop.