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

Discus and support Win 10 Pro 1909 to 20H2 upgrade - Update Boot Code Error in Windows 10 Installation and Upgrade to solve the problem; 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... Discussion in 'Windows 10 Installation and Upgrade' started by shadowcatone, May 31, 2021.

  1. SHADOWCATONE
    shadowcatone Win User

    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, May 31, 2021
    #1
  2. MRJORDAN
    MrJordan Win User

    Can't upgrade from Win 10 Pro 1909 0xC1900101-0x20017

    For months Windows Update has offered to install 2004 and then 20H2 but the install always fails after the first reboot and rolls back to 1909. I've tried reinstalling 1909 on top of itself from an ISO first and then upgrading, running the update from a 20H2 ISO file and even doing a clean boot before trying the upgrade from an ISO. All fail with the same error code:


    Win 10 Pro 1909 to 20H2 upgrade - Update Boot Code Error [​IMG]


    Can anyone offer advice on how to resolve this?

    Thanks!
     
    MrJordan, May 31, 2021
    #2
  3. RESK208
    RESK208 Win User
    Error code 0x8009000f on upgrading to Windows 10 from Windows 7 Pro.

    Original Title: upfrade to Win 10

    In trying to upgrade my Windows 7 Pro to 10, when it started the upgrade if halted with the error code 0x8009000f. I cann ot find this error code in any of the online listings. Any Suggestions? RES
     
    RESK208, May 31, 2021
    #3
  4. SPARKEY1000
    Sparkey1000 Win User

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

    Windows 10 pro 1903 will not update to Win 10 Pro 1909

    Notes:

    1) Computer originaly used Win 7 Pro OA (OEM)

    2) Reformatted the HD

    3) Used Win10 Pro version 1903 to install on the Win 7 Pro OA (OEM) based computer.

    4) Used the OA Product Key that was listed on the Computers Case.

    5) Installation completed.
    Program confirms activation is valid.

    6) Win 10 Pro will not list an available upgrade to Win 10 pro version 1909.
     
    Sparkey1000, May 31, 2021
    #4
Thema:

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

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