You may have noticed that each time one of your contacts comes online, there's a small notification popping out of the system tray. This can be quite annoying, as this can cause some programs to exit full screen mode.
To disable this feature:
- Click Tools > Options > General > Notification > Notification settings.
- Just below " Display a notification in the Windows tray when someone ...." Uncheck the box next to "comes online"
- Validate with the Save button.