"Error 25090" error message when you start an Office program


When you try to start a Microsoft Office 2007 or Microsoft Office 2003 program, you may receive the following error message or an error message that is similar to the following:

Error 25090. Office Setup encountered a problem with the Office Source Engine, system error: -2147023836. Please open SETUP.CHM and look for "Office Source Engine" for information on how to resolve this problem.


This behavior occurs when the following conditions are true:

  • Two people installed Office on the same computer.
  • Both installations were completed by using the AllUsers="" parameter to set the installation for the installing user account only.
  • When both people were prompted to remove files that were copied locally at the end of Setup, both people did not remove the files.
  • One of the two people removed Office.


To resolve this behavior, start the Setup program for Office. To do this, follow these steps:

  1. Insert the Microsoft Office 2003 CD in your CD drive or DVD drive.
  2. If the Setup program does not start automatically, locate the Setup.exe file on the CD, and then double-click the file to start Setup.
  3. After the Setup window appears, cancel Setup, and then respond to the prompts to exit Setup.


You do not have to complete the Setup program. Setup fixes the error condition when it is first invoked.