Cannot Uninstall UxTheme Core Beta under Windows 8 after upgrade


  1. Sovereign
    Posts : 1
    Windows 8 Pro x64
       New #1

    Cannot Uninstall UxTheme Core Beta under Windows 8 after upgrade


    I upgraded in-place from Windows 7 Professional SP1 x64 to Windows 8 Pro x64. I do not have Windows 8.1.

    I forgot about UxTheme Core until post-upgrade, then figured I might as well uninstall it since it was designed for an OS I was no longer running.

    However, I am not permitted to uninstall because "Your theme subsystem (e.g. uxtheme.dll, themeui.dll) has been tampered with. UxStyle requires these files be restored before you can continue."

    Well yeah, these are Windows 8 files which have not been touched--but they're not Windows 7's, so the uninstaller refuses to move forward.

    I have tried installing the Windows 8 compatible beta on top of this one but that also fails based on a "previous version" being installed already.

    Is there some way to forcibly remove the old Windows 7 UxTheme?
      My Computer
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  3. Bongo
    Posts : 12,120
    Win 7 Pro x64 / Win 10 Pro
       New #2

    Welcome to the Seven Forums

    Do Option 2 of this tutorial SFC /SCANNOW Command - System File Checker it will not harm any data or programs you have installed it will try to find and repair any corrupt system files that you have. You may need to do this up to 3 times with a reboot after each scan.

    Then try to uninstall it.

    If that does not work:
    Click on the Start Button type in Services In the search box and then click on Services
    Cannot Uninstall UxTheme Core Beta under Windows 8 after upgrade-1.png


    Scroll down until you see Unsigned themes select it in click on the Stop text and let it stop then go to C:\Windows and delete UnsignedThemesSvc.exe
    Cannot Uninstall UxTheme Core Beta under Windows 8 after upgrade-4.pngCannot Uninstall UxTheme Core Beta under Windows 8 after upgrade-stop.png

    Jerry
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