Error 0xa0000400 in Windows Update Assistant - Windows 10 RRS feed

  • Frage

  • Hello,

    i have a windows 10 version 1803 and i'm trying to upgrade it to version 1903 using the assistant.

    When I launch it, I get the following error:


    can somebody help me fix that?

    kindest regards.

    Donnerstag, 4. Juli 2019 09:41

Alle Antworten

  • Hi Eugy Studente.

    As far as I know, there are no specific reasons for that error.
    Try updating Windows 10 in a different way: go to https://www.microsoft.com/en-us/software-download/windows10, download the Media Creation Tool, execute it and choose the option to create an installation package for a different PC; wait for the download of the ISO file and use that file to create a Windows 10 installation DVD (or a bootable pen drive).
    Use that DVD to reboot your PC and start the Windows 10 installation process: when prompted, choose the option to execute an upgrade installation and wait for the process to complete.


    Luigi Bruno

    Donnerstag, 4. Juli 2019 10:04
  • Hi,


    As Luigi said, you may download Windows 10 1903 ISO and use that for updating your system.


    Some similar posts as your reference:



    Hope above information can help you.

    Please remember to mark the replies as answers if they help.
    If you have feedback for TechNet Subscriber Support, contact tnmff@microsoft.com.

    Freitag, 5. Juli 2019 03:12
  • To evaluate the computer enironment please post logs for troubleshooting.

    Using administrative command prompt copy and paste this whole command.

    Make sure the default language is English so that the logs can be scanned and read.


    The command will automatically collect the computer files and place them on the desktop.

    Then use 7zip to organize the files and one drive, drop box, or google drive to place share links into the thread for troubleshooting.


    This command will automatically collect these files:  msinfo32, mini dumps, drivers, hosts, install, uninstall, services, startup, event viewer files, etc.

    Open administrative command prompt and copy and paste the whole command:

    copy %SystemRoot%\minidump\*.dmp "%USERPROFILE%\Desktop\"&dxdiag /t %Temp%\dxdiag.txt&copy %Temp%\dxdiag.txt "%USERPROFILE%\Desktop\SFdebugFiles\"&type %SystemRoot%\System32\drivers\etc\hosts >> "%USERPROFILE%\Desktop\hosts.txt"&systeminfo > "%USERPROFILE%\Desktop\systeminfo.txt"&driverquery /v > "%USERPROFILE%\Desktop\drivers.txt" &msinfo32 /nfo "%USERPROFILE%\Desktop\msinfo32.nfo"&wevtutil qe System /f:text > "%USERPROFILE%\Desktop\eventlog.txt"&reg export HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall "%USERPROFILE%\Desktop\uninstall.txt"&reg export "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components" "%USERPROFILE%\Desktop\installed.txt"&net start > "%USERPROFILE%\Desktop\services.txt"&REM wmic startup list full /format:htable >"%USERPROFILE%\Desktop\startup.html"&wmic STARTUP GET Caption, Command, User >"%USERPROFILE%\Desktop\startup.txt"

    There is one file for you to find manually:  dxdiag:  

    In the left lower corner search type:  dxdiag > When the DirectX Diagnostic Tool opens click on the next page button so that each tab is opened > click on save all information > save to desktop > post one drive or drop box share link into the thread

    Please remember to vote and to mark the replies as answers if they help.
    Freitag, 5. Juli 2019 18:19