First one double left clicks the mouse then moves the mouse in the pattern that they have set as their signature, and a single right click communicates that they have completed there password entry, at which time the screen will go away revealing the windows below.

To enter the password using the numeric value tap the alt button then the f button then the e button and proceed with typing the password and then hit a to authorize the password, at the successful compellation of this the screen will go away also revealing the windows below.

The latter process must be done fast though as the system would be vulnerable at that point due to operating restraints, but I felt with the dirty mouse's this ability would be needed at some time.

shown below is the screen that will pop up with the alt f e command described above. You may use your mouse with it as well.

The windows shut down offers a person with no password to be able to shut down the computer properly as opposed to just turning it off.