After updating WMP you an error from wmploc.dll about the version number being incorrect

Source: Microsoft Support

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You install a hotfix or update that updates wmp.dll.

You get the error:
     The file wmploc.dll has a version number of 11.0.6001.7000 where 11.0.6001.7004 was expected.

     Windows Media Player is not installed properly and must be reinstalled.

     Do you want to install the Player from the Microsoft Web site?

Note that the version numbers listed can vary depending on the Windows Media Player version and the version of the hotfix that was installed.

The version of wmp.dll is out of sync with what is set in the Windows registry.

On Windows Vista:

1. Reboot your system.
2. Open cmd.exe as an administrator by selecting Start/All Programs/Accessories. 
3. Right click on Command Prompt and choose Run as administrator.
4. Type in
   unregmp2.exe /UpdateWMPVersion
5. Press enter.

On Windows XP and Windows 2003 and earlier:

1. Reboot your system.
2. Select Start/Run and type in:
   %SystemRoot%\inf\unregmp2.exe /UpdateWMP
3. Click Ok.

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