Disable Messenger Instructions

Go to the START menu, Select Run and type in services.msc and click OK.

Now a new window will appear with lots of "services" on the right hand side...

Scroll down and find the Messenger service, select it, right click it and choose properties.



Under Startup Type select Manual. (or Disabled)

Then click the Stop button.

Then click the Apply button.

Then click the OK button.

See this site: http://www.updatexp.com/messenger_service_spam.html