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Disable Baloon tips.
To disable Ballon tips in Windows XP do this registry tweak
Go to : HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionExplorerAdvanced
Create a new DWORD value, name it EnableBalloonTips, and set it equal to 0. If EnableBalloonTips is already there and equal to 1, set it equal to 0. Quit the registry editor, log off, and log back on. Voila! Your computer will stop talking down to you.