The Add-In 'C:\WINDOWS\SYSTEM\Xcolext' could not be installed" error message when you start Microsoft Outlook 2000 or Outlook 2002 (825034)


The information in this article applies to:

  • Microsoft Outlook 2002
  • Microsoft Outlook 2000, when used with:
    • Microsoft Windows XP Professional
    • Microsoft Windows XP Home Edition

SYMPTOMS

After you upgrade your computer from Windows 98 to Windows XP, you may receive the following error when you start Outlook:
The add-in "C:\WINDOWS\SYSTEM\Xcolext.DLL" could not be installed or loaded
If you click OK on this error message, Outlook starts correctly.

RESOLUTION

To resolve this issue, follow these steps:
  1. Start Outlook.
  2. On the Tools menu, click Options.
  3. Click the Other tab, and then click Advanced Options.
  4. On the Advanced Options dialog box, click Add-In Manager.
  5. In the Add-In Manager dialog box, click to clear the XTNDConnectPC check box.
  6. Click OK three times.
  7. Quit and then restart Outlook.
If you still receive the error message, update the Extend.dat file. The Extend.dat file is a binary file that caches the registry extension entries. To update the Extend.dat file, follow these steps:
  1. Quit all programs.
  2. Click Start, point to Search, and then click All Files and Folders.
  3. Type extend.dat in the All or part of the file name box.
  4. In the Look In box, click your hard disk.
  5. Click Search.
  6. In the results pane, right-click the Extend.dat file, and then click Rename.
  7. Type extend.old, and then press ENTER.
  8. On the File menu, click Close.
  9. Restart Outlook.

    A new Extend.dat file is created.
Modification Type:MinorLast Reviewed:2/22/2006
Keywords:kbinterop kbprb KB825034 kbAudEndUser
©2004 Microsoft Corporation. All rights reserved.