May 142008

Windows XP SP3 installation may fail with the error code 0×80070005 and/or one of the following errors

Service Pack 3 setup error. Access is denied.

Service Pack 3 setup error. Service Pack installation did not complete

This is very likely a restricted registry permission in the Windows Registry. This could be caused an application like Antivius software which changs the System Access Control lists (SACL) causing this issue.

To quickly identify if it really is a registry permission issue check the

C:\Windows\Svcpack.log (or %windir%\Svcpack.log) for something similar to the following lines

DoInstallation:DoRegistryUpdates failed.
Access is denied.
Message displayed to the user: Access is denied

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