Lock ur PC just by double clicking Mouse

You can lock your XP workstation with two clicks of the mouse. Create a new shortcut on your desktop using a right mouse click, and enter 'rundll32.exeuser32.dll,LockWorkStation' in the location field.Give the shortcut a name you like. That's it -- justdouble click on it and your computer will be locked.And if that's not easy enough, Windows key + L will do the same.