[rockets redglare]

1.Click Start->Settings ->Control Panel
2.Click Administrative Tools
3.Click Services
4.Double click Services Scroll
5.Scroll down and highlight "Messenger"
6.Right-click the highlighted line and choose Properties.
7.Click the STOP button.
8.Select Disable or Manual in the Startup Type scroll bar
9.Click OK

Hope this is what you're looking for.