Microsoft KB Archive/263178

= Error Message: CAPI: The Install Failed. The Rsabase.dll File That Is Being Installed Doesn't Match... =

Article ID: 263178

Article Last Modified on 6/23/2005

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APPLIES TO


 * Microsoft Internet Information Server 4.0

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This article was previously published under Q263178



We strongly recommend that all users upgrade to Microsoft Internet Information Services (IIS) version 6.0 running on Microsoft Windows Server 2003. IIS 6.0 significantly increases Web infrastructure security. For more information about IIS security-related topics, visit the following Microsoft Web site:

http://www.microsoft.com/technet/security/prodtech/IIS.mspx



SYMPTOMS
When you try to install Windows NT Service Pack (SP4) as a prerequisite to the install of the Windows NT Option Pack (NTOP), the following error message may occur:

CAPI: The install failed. The rsabase.dll file that is being installed doesn't match the signature file or the value in the registry.



CAUSE
This is caused by a version mismatch in the Rsabase.dll and Rsasig.dll files. This version mismatch can occur by installing Internet Explorer 5, re-applying SP4, and then installing the NTOP.



RESOLUTION
The correct file versions for the service pack can be obtained from the Microsoft DLL Help database at the following location:

http://support.microsoft.com/dllhelp

When you have the correct file versions, rename the incorrect file, copy the correct version from the service pack media, disable (uncheck) the &quot;Read Only&quot; attribute (if applicable), and then re-apply the service pack.



MORE INFORMATION
For the proper installation order for IIS 4.0, please see:

http://support.microsoft.com/support/iis/install/install_iis4.asp

If you are installing Site Server, please see:

http://support.microsoft.com/support/siteserver/install/install_ss3.asp

Additional query words: iis 5

Keywords: kbprb kbpending KB263178

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