Windows 10: Upgrade to 20H2 fails

When trying to upgrade to 20H2, I get this error. 0x8e5e0152

I have a 2 m. 2 to start another one for normal things, music, games, etc. I'm not sure if I put something where it shouldn't be and screwed up my intuitive experience.

I will provide more information if necessary.

:)

 

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?

 

Ssd upgrade

What do you mean "no good"? At which step did it fail?

 

Windows 10 20H2 Upgrade

Based on @WolfyAmbassador's original post on the registry changes needed to run the 20H2 repair install using an in-place upgrade...

Known and Resolved issues for Windows 10 version 20H2

...I documented these steps that minimize the amount of registry editing that needs to be done, and includes a backup of the original values -

Known and Resolved issues for Windows 10 version 20H2