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"Error 25004. The product key you entered cannot be used on this machine” when Installing Microsoft Office 2010

When installing Microsoft Office 2010, you may receive the following error:

Microsoft Office encountered an error during setup.
Error 25004. The product key you entered cannot be used on this machine.  This is most likely due to previous Office 2010 trials being installed. (System error: -1073422308)
This error may be caused by one of the following scenarios.

Cause 1:
The Microsoft Office 2010 Trial was installed once, and the user is attempting to install it a second time.

Cause 2:
There was an earlier beta release of Microsoft Office 2010 installed on the computer and there are peices of the installation that were not completely removed from the computer.
Workaround for Cause 1:
This functionality is by design; only one Trial installation is permitted. You may purchase a retail version of Microsoft Office 2010 from

Workaround for Cause 2:
1. Download and execute the Office Fix It utility for the specific Office version you are using from KB290301. This utility is intended to remove Office 2003-2010 suites when they cannot be removed via Add/Remove programs.

2. Restart your computer.
3. Try to reinstall Office 2010 again.
25004 Office 2010 key error
Note This is a "FAST PUBLISH" article created directly from within the Microsoft support organization. The information contained herein is provided as-is in response to emerging issues. As a result of the speed in making it available, the materials may include typographical errors and may be revised at any time without notice. See Terms of Use for other considerations.

Article ID: 2559816 - Last Review: 08/26/2011 21:58:00 - Revision: 2.2

  • Microsoft Office Home and Student 2010
  • Microsoft Office Home and Business 2010
  • Microsoft Office Standard 2010
  • Microsoft Office Professional 2010
  • Microsoft Office Professional Plus 2010
  • KB2559816