CAUSE
This error occurs when MS04-038 is installed on a computer with a failed Windows XP Service Pack 2 (SP2) installation. Typically, if Windows XP SP2 installation fails, an automatic rollback occurs that returns the computer to the pre-Windows XP SP2 installation state. If automatic rollback does not occur, the service pack recovery process will partially uninstall Windows XP SP2 after you restart your computer. (For example, automatic rollback may not occur if a power failure occurs during Windows XP SP2 installation.) After you restart the computer again, you receive a message that prompts you to use Add or Remove Programs in Control Panel to manually remove the remnants of the failed installation.
If you do not follow this recommendation, and you do not use Add or Remove Programs to remove the remnants of the failed installation, your computer will have pre-Windows XP SP2 files, and your registry will contain Windows XP SP2 information.
If your computer has pre-Windows XP SP2 files and your registry contains Windows XP SP2 information, Windows Update (
http://windowsupdate.microsoft.com/) or Automatic Updates offers the Windows XP SP2 version of the MS04-038 (
http://www.microsoft.com/technet/sec.../ms04-038.mspx) security update.
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