(how to stop Windows Messanger popup ads)
Windows XP Home
1. Click Start->Settings ->Control Panel
2. Click Performance and Maintenance
3. Click Administrative Tools
4. Double click Services Scroll
5. 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
Windows XP Professional
1. Click Start->Settings ->Control Panel
2. Click Administrative Tools
3. Click Services
4. Double click Services Scroll
5. 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
from
http://www.couplescompany.com/Features/popupproblem.htm