You might have faced the problem, when you try to run Windows Media Player. An error dialog box appears “Windows Media Player is not installed properly and must be reinstalled.”

Literally it happens due to mismatch version of some core Windows Media Player files. Following reasons may cause the problem like this-

  • Windows Updates might have failed to installed Windows Media Player updates.
  • You might have patched Windows Media Player files like wmplayer.exe, wmp.dll and so on.

The error messages may differ, but primarily it state

Windows Media Player is not installed properly and must be reinstalled. Do you want to reinstall from Microsoft website?

Windows Media Player is not installed properly

By following guide, you can also get rid of following errors-

“The file wmp.dll has a version 12.0.XXXX.YYYY where 12.0.AAAA.BBBB was expected. Windows media player is not properly installed and must be reinstalled. Do you want to reinstall from Microsoft website?”

“The file wmplayer.exe has a version 12.0.XXXX.YYYY where 12.0.AAAA.BBBB was expected. Windows media player is not properly installed and must be reinstalled. Do you want to reinstall from Microsoft website?”

“The file wmploc.dll has a version 12.0.XXXX.YYYY where 12.0.AAAA.BBBB was expected. Windows media player is not properly installed and must be reinstalled. Do you want to reinstall from Microsoft website?”

The major version of Windows Media Player may differ as per your Windows and Windows Media Player, for case it is 12

How To:

1. Close all Windows Media Player instances and Run Command Prompt as Administrator

2. Execute the following command-

UNREGMP2.EXE /UPDATEWMPVERSION Or UNREGMP2.EXE /UPDATEWMP

REGSVR32.EXE WMP.DLL

3. That’s it, now you can re-launch Windows Media Player and you won’t get error message anymore.

Applies To:

  • Windows Media Player 11
  • Windows Media Player 12

47 responses to “Fix: Windows Media Player is not installed properly and must be reinstalled.”

  1. Royal Avatar

    Step 1 .Delete Window Media Player Folder in (C: Program File x86) if u can’t delete it (before delete u can copy and back up if not sure) then use {iobit unlocker} to Unlock and Delete it.
    Step 2 . Copy Window Media Player Folder in ( C: Program File) to (C: Program File x86)
    It worked for me. I am happy now :D Try it if u think it could help for u (Friend).

  2. Joe Avatar

    Tried to start wmsetup.exe and a message that said “there is a newer version already installed, can’t use an earlier version to setup the program.

  3. Joe Avatar

    Thanks. I’ve been putting up with WMP crap trying to fix it for 2 yrs. Been told I had to re-install Windows to get this to work. I gave up and got several other media players. Thank you. Thank you.!!!!!!!!

  4. HIN Avatar

    Christian thanks for your helps, thats very awesome

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