to turn those balloon pop-ups off:
1. Launch regedit.
2. Open
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced.
3. Create a REG_DWORD named EnableBalloonTips.
4. Set the value data to 0.
5. Close regedit.
6. Reboot the computer.
Setting the value to 1 will turn the balloon tips back on if you decide you can't live without them.