Microsoft KB Archive/170842

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Setup.exe Causes Errors When Logging on

Article ID: 170842

Article Last Modified on 10/31/2006


  • Microsoft Windows NT Workstation 4.0 Developer Edition
  • Microsoft Windows NT Server 4.0 Standard Edition

This article was previously published under Q170842


You may encounter the following application error or Dr. Watson message when you log on to a computer running Windows NT 4.0 Workstation or Server:

An Application error has occurred and an application error log is being generated.

Exception access violation (0xC0000005), Address 0x00401167

This error may occur even if Setup.exe does not reside in the startup group and the LOAD, RUN, and RUNONCE values under the following registry keys do not contain entries for Setup.exe:




When a user logs on to a computer running Windows NT Workstation or Server, Setup.exe from the <winnt>\system32 directory is called. The above error may occur if the original Setup.exe is replaced by another application's version of Setup.exe. For example, if the Microsoft SQL Server version of Setup.exe is copied into the system32 directory, the above error message will occur. Other versions of Setup.exe may produce different errors.


As of Service Pack 3, Setup.exe has not been updated from the original release version of Windows NT 4.0. Check the file size and date of Setup.exe in the <WINNT>\System32 directory. The correct file size should be 24,848 (or 25 KB) and dated on or about 8/1/96. If the file size or date does not match this, expand this file from the Windows NT CD-ROM\<platform> directory.

Keywords: kberrmsg kbinfo kbinterop KB170842