Windows 10: Windows Error Code 0xa0000400 when trying to upgrade to Windows 11 via installation assistant

Discus and support Windows Error Code 0xa0000400 when trying to upgrade to Windows 11 via installation assistant in Windows 10 Gaming to solve the problem; PC Health Check says that the PC is all ready for Windows 11, but when I went to install Windows 11 through the Windows 11 installation assistant, it... Discussion in 'Windows 10 Gaming' started by Gh0stW0lf, Nov 2, 2024.

  1. Gh0stW0lf Win User

    Windows Error Code 0xa0000400 when trying to upgrade to Windows 11 via installation assistant


    PC Health Check says that the PC is all ready for Windows 11, but when I went to install Windows 11 through the Windows 11 installation assistant, it started at 0% and then I got hit with an error code ''0xa0000400''. Computer specifications:Intel i5-11400F NVIDIA GeForce RTX 307032 GB RAM500 GB SSD1 TB HDDWindows version: Version 21H2 OS Build 19044.5011

    :)
     
    Gh0stW0lf, Nov 2, 2024
    #1

  2. Cannot upgrade Windows 11 from Windows 10 Error Code 0xa0000400

    Cannot install Windows 11: After hitting Accept and Install for Windows 10 to 11 getting error code 0xa0000400.
     
    Cleve Taylor, Nov 2, 2024
    #2
  3. pqraz Win User
    Windows 10 Upgrade Assistant Error 0xa0000400

    I have windows 8.1 Embedded Industry Pro, I reserved my windows 10 update prior to July 29th but have recieved no update notification since then so I tried using the Upgrade Assistant but recieved error code '0xa0000400'. How can I go about getting windows
    10 now considering I do have it reserved?
     
    pqraz, Nov 2, 2024
    #3
  4. Tenforo Active Member

    Windows Error Code 0xa0000400 when trying to upgrade to Windows 11 via installation assistant

    Can't run Windows 11 Installation Assistant

    Every time I try to run the installation assistant for Windows 11 it shows 0%, and right after goes to a screen saying "something went wrong" and giving me the error code 0xa0000400.
     
    Tenforo, Nov 2, 2024
    #4
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Windows Error Code 0xa0000400 when trying to upgrade to Windows 11 via installation assistant

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  1. Windows Error Code 0xa0000400 when trying to upgrade to Windows 11 via installation assistant - Similar Threads - Error Code 0xa0000400

  2. Windows Error Code 0xa0000400 when trying to upgrade to Windows 11 via installation assistant

    in Windows 10 Installation and Upgrade
    Windows Error Code 0xa0000400 when trying to upgrade to Windows 11 via installation assistant: PC Health Check says that the PC is all ready for Windows 11, but when I went to install Windows 11 through the Windows 11 installation assistant, it started at 0% and then I got hit with an error code ''0xa0000400''. Computer specifications:Intel i5-11400F NVIDIA GeForce RTX...
  3. Windows Error Code 0xa0000400 when trying to upgrade to Windows 11 via installation assistant

    in Windows 10 Software and Apps
    Windows Error Code 0xa0000400 when trying to upgrade to Windows 11 via installation assistant: PC Health Check says that the PC is all ready for Windows 11, but when I went to install Windows 11 through the Windows 11 installation assistant, it started at 0% and then I got hit with an error code ''0xa0000400''. Computer specifications:Intel i5-11400F NVIDIA GeForce RTX...
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