You can lock your XP workstation with two clicks ofthe mouse.
Create a new shortcut on your desktop usinga right mouse click, and enter
Code:
rundll32.exe user32.dll,LockWorkStation
in the location field.
Give the shortcut a name you like.
That's it -- just double click on it and your computer will be locked.
And if that's not easy enough,
Windows key + L will do the same.