Windows 10: Surgery Needed on System Reserved Partition? Upgrade from 20H2 to 21H1 always fails at 97%

Discus and support Surgery Needed on System Reserved Partition? Upgrade from 20H2 to 21H1 always fails at 97% in Windows 10 Installation and Upgrade to solve the problem; I bought a new Lenovo Legend 5 laptop recently, which then upgraded itself to Windows 20H2 almost I think immediately. It is registered. I was in the... Discussion in 'Windows 10 Installation and Upgrade' started by Oudeheis, Jun 23, 2021.

  1. Oudeheis Win User

    Surgery Needed on System Reserved Partition? Upgrade from 20H2 to 21H1 always fails at 97%


    I bought a new Lenovo Legend 5 laptop recently, which then upgraded itself to Windows 20H2 almost I think immediately. It is registered. I was in the midst of migrating Thunderbird when it then started trying to upgrade to Win 21H1, virtually every day, but reporting failure at 97% each time and rolling back the attempt. V E R Y frustrating. I scoured the internet looking for a remedy, applying at least a dozen of them. None worked. The most daring remedy which kept being suggested was to insure that the System Reserved Partition had to have at least 500 MB. Scouring the web again, I

    :)
     
    Oudeheis, Jun 23, 2021
    #1
  2. Alan B Win User

    "Windows 10 couldn't be installed - we could update the system reserved partition"

    I think you mean "could not update", not "could".

    Suggestions:

    • Disconnect any other hard drives.
    • Run chkdsk /f on the System Reserved partition. You'll have to do this from the CMD prompt in Repair Mode.
    • Initially there were reports of some System Reserved partitions being too small for the upgrade. Search for details if the first two suggestions fail.
     
    Alan B, Jun 23, 2021
    #2
  3. poolmon Win User
    Recovery Partition vs System Reserved Partition

    Thanks for all the info guys.

    Both original & target SSD's are listed as MBR as opposed to UEFI. I may have created a partition unknowingly in getting the original/new unformatted drive recognized, but I don't recall taking any steps that Windows did not step me through.

    Not that an upgrade to WIN 10 Pro is contemplated, but I suspect that having no System Reserved partition will not allow that to happen, after seeing how the original WIN 10 upgrade created a problem for some WIN 7 users that had a smaller 100mb vs 500mb System Reserved partition.
     
    poolmon, Jun 23, 2021
    #3
  4. Surgery Needed on System Reserved Partition? Upgrade from 20H2 to 21H1 always fails at 97%

    Anthony Gal, Jun 23, 2021
    #4
Thema:

Surgery Needed on System Reserved Partition? Upgrade from 20H2 to 21H1 always fails at 97%

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