Microsoft KB Archive/180002

= XADM: Error Message: Hotfix Already Installed =

Article ID: 180002

Article Last Modified on 10/28/2006

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APPLIES TO


 * Microsoft Exchange Server 4.0 Standard Edition
 * Microsoft Exchange Server 5.0 Standard Edition
 * Microsoft Exchange Server 5.5 Standard Edition

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This article was previously published under Q180002



SYMPTOMS
When you attempt to install a hotfix that has previously been installed, you may receive the following error message:

Hotfix already installed.



CAUSE
The Hotfix program checks the HOTFIX key in the registry to determine if the hotfix being applied has already been installed.

This error occurs if the POST-SPx hotfix was not specifically removed prior to reapplying the service pack.



WORKAROUND
When you apply a hotfix using the hotfix program, it adds a registry value to the Windows NT registry to indicate that it has been applied. This value may be removed using the registry editor for Microsoft Windows NT. The following procedure can be used to remove this value and reapplying hotfixes.

WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk.

 Run Registry Editor (Regedt32.exe).  From the HKEY_LOCAL_MACHINE subtree, go to the following key:

     \SOFTWARE\Microsoft\Windows NT\CurrentVersion\HOTFIX  Select the HOTFIX key and press the Delete (Del) key on the keyboard or click Delete on the Edit menu. Reinstall all applicable hotfixes.

Additional query words: Post spx sp4 /i /r

Keywords: kbprb KB180002

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