Notification balloons are those annoying things popping up in a balloon that tells you basic stuff about the OS, so unless you are one of the few that actually enjoys the balloons you may want to get rid of them.
- Open regedit
- Navigate to this location
- In the right pane right click and select new DWORD
- Set the name as EnableBalloonTips
- Keep the value data set at 0
- You will need to restart your PC to see it take effect