Windows 10: MSE wont uninstall Solved

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  1.    05 Aug 2015 #11

    MikeWilliams said: View Post
    Looks like my best bet is to roll back to 7, uninstall MSE then upgrade 10 again.
    Or back your data up and do a refresh - which in essence is a clean install - but yeah
      My ComputerSystem Spec

  2.    05 Aug 2015 #12

    Already got data backed up, but I am not going to do a clean install as I need to see how many gotchas there are in the upgrade process.
      My ComputerSystem Spec

  3. Posts : 615
    Windows 10 Enterprise x64 (build 10586)
       05 Aug 2015 #13

    Can you go to %windir%\installer, add the Subject column, and look for MSE, Microsoft Security Essentials, or something like that in the Subject column? If you run the installer directly (MSI file), you may be able to bypass the message that prevents you from uninstalling MSE.
      My ComputerSystem Spec

  4.    06 Aug 2015 #14

    After roll back to 7, Uninstall MSE, Upgrade to 10 all is now all is well and Windows Defender is a happy bunny.
      My ComputerSystem Spec

  5.    18 Aug 2016 #15

    There is a much easier way to fix this. I followed this 'solved' thread with hope, but was disappointed with the solution above since I didn't want to roll-back to Windows 7. The details on how to do this easy method are here:

    The MSE Setup program both installs and uninstalls the program. When running on Windows 10 it declares that you should not run it and does not go any further (see screen shot on first post). The solution is to change the Properties of the Setup program to run in Compatibility mode with Windows 7. It will then run fine and agree to uninstall MSE. After that, I strongly suggest you restart Windows without Updating (in case 'update and restart' is shown as an option, bypass it and just choose to 'restart' the machine). Then your problem will be fixed.
      My ComputerSystem Spec

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