Microsoft KB Archive/825034

= The Add-In 'C:\WINDOWS\SYSTEM\Xcolext' could not be installed&quot; error message when you start Microsoft Outlook 2000 or Outlook 2002 =

Article ID: 825034

Article Last Modified on 2/22/2006

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APPLIES TO

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

 Microsoft Windows XP Home Edition 

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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 &quot;C:\WINDOWS\SYSTEM\Xcolext.DLL&quot; could not be installed or loaded

If you click OK on this error message, Outlook starts correctly.

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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.

Additional query words:

Keywords: kbinterop kbprb KB825034

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