Windows 10: Failed win 10 upgrade from version 1909 to 20h2 with error code 800706be

Discus and support Failed win 10 upgrade from version 1909 to 20h2 with error code 800706be in Windows 10 Software and Apps to solve the problem; I have tried numerous times to upgrade win10 from version 1909 and always get failures.I have removed all additional hardware I could and disabled the... Discussion in 'Windows 10 Software and Apps' started by Gerry Peirce, Jan 23, 2022.

  1. Failed win 10 upgrade from version 1909 to 20h2 with error code 800706be


    I have tried numerous times to upgrade win10 from version 1909 and always get failures.I have removed all additional hardware I could and disabled the realtek audio in the bios and removed apps relating to these and any drivers, but still get upgrade failer.I have run dism and sfc to check system - no errorsI have tried Windows10Upgrade9252.exe and MediaCreationTool20H2.exe as well as the win10 update process all of these fail with same error. I tried removing all the upgrade files in c:\$windows.~BT and and still get same error.I have run setupdiag.exe and post a snipit of the error failure

    :)
     
    Gerry Peirce, Jan 23, 2022
    #1
  2. Rad1o Win User

    Upgrade to 20H2 failed

    The laptop was offered the feature upgrade to Win 10 20H2. It is still running 1903. It had failed 1909, 2004 with this error 0x80004005 - 0x1000A,The installation failed in the DOWNLEVEL phase with an error during PREPARE_FIRST_BOOT operation.

    Since Microsoft does not like this laptop anymore I had done a chkdsk, a SFC / scannow and a disk error check from the properties tab. All errors fixed.

    I stopped MS secutity, firewall and the Avast security for the upgrade.

    Downloading and installing took some time and it looked as if the laptop was going through the motions. At the end it had just reverted to 1903 again.

    What else can I do short of a complete reset?
     
    Rad1o, Jan 23, 2022
    #2
  3. zbook Win User
    Upgrade from 1909 to 20H2

    When upgrading you can install 1607 and upgrade to 20H2.
    So upgrade from 1909 to 20H2 with the upgrade assistant.

    If there is success then that will complete the thread.
    If the upgrade fails then record the error message and code for troubleshooting.
     
    zbook, Jan 23, 2022
    #3
  4. Failed win 10 upgrade from version 1909 to 20h2 with error code 800706be

    Win 10 Pro 1909 to 20H2 upgrade - Update Boot Code Error

    I have been trying to upgrade my custom-built Win 10 Pro from 1909 to 20H2.

    I am using standard Windows Update from inside Win 10.

    I keep getting an Update Boot Code error - 0x80004005[gle=0x000000b7].

    I am running my system in CSM Mode. I am using standard MBR disks.

    I have attached images of the Setupdiag log, the BCD store and my Disk Management display.

    Does my System Reserved partition need to be FAT32 or need a drive letter?

    I have scoured the web but I haven't found a solution for this error code. Please help. TIA!
     
    shadowcatone, Jan 23, 2022
    #4
Thema:

Failed win 10 upgrade from version 1909 to 20h2 with error code 800706be

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