1. Joined : Aug 2015
    Posts : 1
    Windows 8.1 Pro
       06 Aug 2015 #1

    Windows 10 installation failed on 2nd stage.

    An error occured when my installation goes to second stage. Then it recovered my last OS version and said that update fail because this "WindowsUpdate_C1900101 OR WindowsUpdate_dt000". What I have to do? My Windows 10 Update application also gone from my taskbar.
      My System SpecsSystem Spec

  2. Joined : Apr 2014
    Space coast of Florida
    Posts : 4,329
    Windows 10 Pro X64 14393.576
       06 Aug 2015 #2

    There are some things you can try in this article by Andre De Costa:

    How to Troubleshoot common Setup and Stop Errors during Windows - Microsoft Community

    Search the article for c1900101.
      My System SpecsSystem Spec


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