FIX: MDAC 2.5 Configuration Dialog Appears After Every Restart

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Article ID: 268062 - View products that this article applies to.
This article was previously published under Q268062
This article has been archived. It is offered "as is" and will no longer be updated.
IMPORTANT: This article contains information about modifying the registry. Before you modify the registry, make sure to back it up and make sure that you understand how to restore the registry if a problem occurs. For information about how to back up, restore, and edit the registry, click the following article number to view the article in the Microsoft Knowledge Base:
256986 Description of the Microsoft Windows Registry
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After you install Microsoft Data Access Components (MDAC) 2.5 on a Microsoft Windows 95/98 or Microsoft Windows NT 4.0 computer, a Windows Setup dialog box appears after every restart, indicating that the MDAC components are being configured.

On Windows 95 computers, the wallpaper may also be removed.


This dialog box is harmless, but misleading, because the MDAC components completed their configuration after the first restart, and there is no further configuration to be done.

Steps to prevent this dialog box from appearing:

  1. Start Registry Editor (Regedt32.exe).
  2. Locate the entry named mdac_runonce under the following key in the registry:
    The value of this entry should be similar to the following:
  3. Click the mdac_runonce entry to highlight it. From the Edit menu, click Delete, and then click Yes if you are prompted to confirm the deletion.
  4. Quit Registry Editor.
If you are redistributing MDAC 2.5 with a software installation package, a supported fix is available that removes this value from the registry. To obtain a copy of this fix, contact Microsoft Product Support Service. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:;EN-US;CNTACTMS
The English version of this fix should have the following file attributes or later:
   Date      Size           File name    
   5/12/00   4096 bytes     Rem_dlg.inf
This fix can be distributed with software installation packages that require the installation of MDAC 2.5, and can be used by automated installer software to remove the registry key. It is recommended that you perform at least one restart before you execute the Rem_dlg.inf file.

This fix is included in MDAC 2.6.


Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.

This problem was corrected in MDAC 2.6.


Article ID: 268062 - Last Review: February 28, 2014 - Revision: 4.2
  • Microsoft Data Access Components 2.5, when used with:
    • Microsoft Windows 95
    • Microsoft Windows 98 Standard Edition
    • Microsoft Windows NT 4.0
kbnosurvey kbarchive kbhotfixserver kbqfe kbbug kbdatabase kbfix kbmdac260fix kbqfe KB268062

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