To disable the Windows XP Notification Area balloon tips:

1. Use the registry editor to navigate to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced.

2. on the Edit menu, press New and DWORD value.

3. Type a Value Name of EnableBalloonTips.

4. Double-click EnableBalloonTips and type 0.

Alternately, open a CMD.EXE window and type:

REG ADD "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /V EnableBalloonTips /T REG_DWORD /F /D 0