DOCUMENT:Q247553  16-DEC-1999  [iis]
TITLE   :Windows NT Option Pack (NTOP) Downgrades MDAC Components
PRODUCT :Internet Information Server
PROD/VER:winnt:4.0
OPER/SYS:
KEYWORDS:

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The information in this article applies to:

 - Microsoft Internet Information Server 4.0 
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SYMPTOMS
========

When you install the Windows NT Option Pack (NTOP), some MDAC components may be
downgraded to the version that is included with the NTOP regardless of the
version of MDAC that is already installed on the computer.

CAUSE
=====

IIS 4.0 ignores the MDAC file and registry version information and installs the
version of MDAC included in the IIS 4.0 Setup program.

WORKAROUND
==========

To work around this problem, you can manually suppress the entire MDAC portion
of the IIS 4.0 (Option Pack) Setup program.

NOTE: If you do not have a version of MDAC installed before you attempt this
workaround, your IIS installation may fail to function properly. MDAC is
required by IIS for some of its basic functionality. Use this workaround at your
own risk.

To suppress the MDAC installation during IIS 4.0 setup, do the following:

1. Copy the Windows NT Option Pack files to a temporary directory on your hard
   drive.

2. Edit the Iisv4.inf file in the temporary directory where you copied the IIS
   4.0 Setup files.

3. Locate the section [Components.x86], and use a semicolon (;) to comment out
   the following line:

   ;DAC=dagsetup.dll,DAGSetup,dagsetup.inf

4. Repeat step 3 for the section [Components.alpha].

Additional query words:

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Keywords          :  
Technology        : kbiisSearch kbiis400
Version           : winnt:4.0
Issue type        : kbprb
Solution Type     : kbpending

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