"A Required .dll File, Clusapi.dll, Was Not Found" When Running SP1 Update.exe

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This article was previously published under Q265440

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SYMPTOMS

If you attempt to run the Windows 2000 Service Pack 1 (SP1) integrated installation command (update.exe /s:folder) while you are logged on to a computer that is running Windows 98, the following error message appears:

Error Starting Program
A required .dll file, Clusapi.dll, was not found.

If you attempt to run the integrated installation command from a computer that is running Windows NT 4.0, the following error message appears:

Update.exe - Entry Point Not Found
The procedure entry point VerifyCatalogFile could not be located in the dynamic link library Setupapi.dll.

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RESOLUTION

To run the integrated installation command, you must be logged on to a computer that is running Windows 2000.

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MORE INFORMATION

For additional information, see the integrated installation method that is documented in the Microsoft Windows 2000 Service Pack Installation and Deployment Guide for Windows 2000 Service Pack 1.

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