The.wms Extension Is Removed From Windows Media Player

Article translations Article translations
Article ID: 320926 - View products that this article applies to.
This article has been archived. It is offered "as is" and will no longer be updated.
Expand all | Collapse all


When you click on links to .wms files after you apply the Windows Media Player update that is described in the following Microsoft Knowledge Base article, .wms files no longer automatically start Windows Media Player:
320920 MS02-032: Windows Media Player Rollup Available


This behavior occurs because the update that is described in Q320920 removes the "application/x-mx-wms" MIME type that is associated with Windows Media Player for Windows Media skin files (.wms).


This behavior is by design.

More information

There is no vulnerability or flaw in the behavior of Windows Media skins. The security mechanisms that govern their use continue to be safe. As part of an ongoing security review, Microsoft decided that the association of .wms files with Windows Media Player was not necessary for the basic operation of the feature. Because of this, and in accordance with the principle of least privilege, the association was removed.
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: 320926 - Last Review: January 17, 2015 - Revision: 1.0
Applies to
  • Microsoft Windows Media Player 7.0
kbnosurvey kbarchive kbenv kbfix kbprb KB320926

Contact us for more help

Contact us for more help
Connect with Answer Desk for expert help.
Get more support from