[Solved] W10 Pro 20H2 to Pro 21H1 in-place upgrade (but keep data)

Discussion in 'Windows 10' started by sebus, Jun 19, 2021.

  1. sebus

    sebus MDL Guru

    Jul 23, 2008
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    I have 20H2 with somehow buggered WU. I really have no time to troubleshoot it (would be quicker to do it from scratch).
    But why not do in-place "upgrade" to keep data
    Always worked.

    But no, this one gives me Keep NOTHING

    Any idea why that would be?

    sebus
     
  2. Tito

    Tito Super Mod / Adviser
    Staff Member

    Nov 30, 2009
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    @sebus

    Did you mean "to 21H1" or do you really want to downgrade from 20H2 to 20H1?
     
  3. sebus

    sebus MDL Guru

    Jul 23, 2008
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  4. kaljukass

    kaljukass MDL Guru

    Nov 26, 2012
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    @Sebus123
    You simply must enable 21H1 features, they are already in Your computer, if it is up-to date.
    No needs to reinstall or go through long upgrade process.
    To enable these features takes less than 5 minutes and everything stays their places.
     
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  5. SAM-R

    SAM-R MDL Guru

    Mar 21, 2015
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    All you need is 21H1 Enablement Package. 19041, 42 & 43 are all the same. It's the Enablement Package that makes the difference.
     
  6. sebus

    sebus MDL Guru

    Jul 23, 2008
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    EP is unlikely to fix any issues with WU (which was the reason to do the "upgrade")

    If you do not understand the question, then maybe it is better not try to answer?
     
  7. Enthousiast

    Enthousiast MDL Tester

    Oct 30, 2009
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    Actually he is correct, you were running a full iso upgrade (probably with a ISO released in which the fix wasn't inserted by MSFT (<.661)) when you just had to install the small 21H1 EP to achieve the "upgrade" from 20H2 to 21H1.

    BAU's fork of my initial script is not needed anymore.
     
  8. sebus

    sebus MDL Guru

    Jul 23, 2008
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    No idea who was to be correct
    I was running full iso of 21H1. The fix applies to installed version, not the one being used to install!