How to Disable Notification Balloons in windows XP

To disable balloon tips in the notification area, follow these steps:

1. Go to : Start > Run > type regedit, and hit the enter key.
2. Locate the following subkey: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
3. Right-click the right side pane, create a new DWORD value, and then name it EnableBalloonTips.
4. Double-click EnableBalloonTips, and then give it a value of 0.
5. Close Registry Editor and restart your system.

DONE.

How To Fix Realtek HD Audio: Error 0xE0000227

This error sometimes appears when installing the Realtek High Definition driver in XP.
You can download the driver here.
Here are some more solution:

Open Device Manager (Start> Control Panel> System> Hardware)
In the "View" menu manager, select "Devices by connection":
Disable and uninstall by right clicking on "Bus Driver for Microsoft UAA High Definition Audio",
You can now install the drivers normally and without error.