[INSTRUCTORF16]

Here's how to stop it in XP/2000:

Right-Click on My Computer
Choose "Manage" from the menu that appears.
In the left column Highlight "Services and Applications"
In the right column Double-Click on "Services".
Double-Click on the service called "Messenger".
Click the "Stop" button to stop the service.
Change the "Startup Type:" to "Manual"
Click "Apply".
Click "OK".
Close "Computer Management"