| Site Server 3.0 Setup Fails When Installed on an Existing 
                  Internet Information Server 4.0 
            Computer | 
            
            The information in this article applies to:
            
              - Microsoft Site Server version 3.0
            
            SYMPTOMS
            During the installation of Site Server 3.0, setup fails to 
            complete successfully. 
            CAUSE
            The Site Server installation assumes that the Default Web Site 
            has not been changed. This extends to Directory Security and 
            authentication methods allowed or supported. 
            RESOLUTION
            The most common change is that either Anonymous access is no 
            longer allowed or Windows NT Challenge Response is no longer 
            enabled. The correct security settings are as follows: 
            
Anonymous: Allowed
Basic Authentication: Not 
              Allowed
NT Challenge Response: Allowed 
After the 
            changes are made, re-run the Site Server Setup 
            program.
Note: You can change back to the desired 
            settings after Site Server has installed successfully. 
            
            Additional query words: 
            Keywords : 
Version : winnt:3.0 
Platform : winnt 
Issue 
            type : kbprb