You receive an "Error 25510" error message for Msador15.dll when you install Office XP (304907)


The information in this article applies to:

  • Microsoft Office XP Professional
  • Microsoft Office XP Small Business
  • Microsoft Office XP Standard
  • Microsoft Office XP Students and Teachers
  • Microsoft Office XP Developer
  • Microsoft Access 2002
  • Microsoft Excel 2002
  • Microsoft FrontPage 2002
  • Microsoft Outlook 2002
  • Microsoft PowerPoint 2002
  • Microsoft Word 2002
This article was previously published under Q304907
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

SYMPTOMS

When you run Setup for Office XP, you may receive the following error message:
Error 25510. Microsoft Office XP requires updated system files not detected on your computer. You must install the System Files Update prior to installing Office. E:\Program Files\Common Files\System\ADO\MSADOR15.DLL is missing when we require version 2.50.4403.4.
The following is sample text is taken from a Windows Installer log file for the Office installation: 
FIsOSPRequired:  OSP Check: Checking for: MSADOR15.DLL   AdoFolder
2.50.4403.4 on platform All
FIsOSPRequired:  OSP Check: Checking for file at e:\Program Files\Common
Files\System\ADO\MSADOR15.DLL 
FIsOSPRequired:  OSP Check: OSP Check Failed: Required OSP file e:\Program
Files\Common Files\System\ADO\MSADOR15.DLL could not be found in specified
directory
Info 2898. An internal error has occurred. (Tahoma8   Tahoma   1            )
Error 25510. Microsoft Office XP requires updated system files not detected 
on your computer.  You must install the System Files Update prior to
installing Office.  e:\Program Files\Common Files\System\ADO\MSADOR15.DLL 
is missing when we require version 2.50.4403.4.
Action ended 4:17:20: OSPNeedUpgrade. Return value 3.

CAUSE

This error message occurs if both of the following are true:
  • The System Files Update is installed on your computer.
  • The data for the CommonFilesDir string value under the following registry key is invalid:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion

RESOLUTION

To resolve this issue, follow these steps.

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.
  1. Click Start and then click Run.
  2. In the Open box, type Regedit and then click OK.
  3. Locate and select the following key in the registry:

    HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion

  4. Double-click the CommonFilesDir string value.
  5. Type the following path in the Value data box, and then click OK:

    C:\Program Files\Common Files

    NOTE: You may need to specify a different path to match this folder location on your computer.

  6. On the Registry menu, click Exit.
  7. Run Setup for Office.

MORE INFORMATION

For additional information about the System Files Update, click the article number below to view the article in the Microsoft Knowledge Base:

286399 OFFXP: Description of the System Files Update

For additional information about a related issue with the CommonFilesDir registry value, click the article number below to view the article in the Microsoft Knowledge Base:

304901 OFFXP: "Error 25509. Microsoft Office XP Requires Updated System Files ..."

Modification Type:MinorLast Reviewed:2/16/2006
Keywords:kbregistration kbsetup kberrmsg kbprb KB304907
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