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We had this issue when doing an in-place upgrade from Windows 7 to Windows 10 (1903) on certain machines while many others went through the process w/o any issue.

We couldn't install Windows 10

We've set your PC back to the way it was right before you started installing Windows 10.

0x8007042B - 0x3000D

The installation failed in the FIRST_BOOT phase with an error during MIGRATE_DATA operation

C:\Windows\setuperr.log

2019-10-18 14:10:28, Error [0x08085f] MIG MigHost: CMigPluginSurrogate::LoadAndRegisterServerInThreadContext: LoadLibraryExW(C:\$WINDOWS.~BT\Sources\ReplacementManifests\Microsoft-Windows-RasServer-MigPlugin\RasMigPlugin.dll, LOAD_WITH_ALTERED_SEARCH_PATH) failed gle=0x7f.[gle=0x0000007f] 2019-10-18 14:10:28, Error [0x080863] MIG MigHost: CMigPluginSurrogate::COMGenericThreadingHostThreadProc: LoadAndRegisterServerInThreadContext() failed hr=0x8007007f.[gle=0x0000007f] 2019-10-18 14:20:29, Error
[0x08085f] MIG MigHost: CMigPluginSurrogate::LoadAndRegisterServerInThreadContext: LoadLibraryExW(C:\$WINDOWS.~BT\Sources\ReplacementManifests\Microsoft-Windows-RasServer-MigPlugin\RasMigPlugin.dll, LOAD_WITH_ALTERED_SEARCH_PATH) failed gle=0x7f.[gle=0x0000007f] 2019-10-18 14:20:29, Error [0x080863] MIG MigHost: CMigPluginSurrogate::COMGenericThreadingHostThreadProc: LoadAndRegisterServerInThreadContext() failed hr=0x8007007f.[gle=0x0000007f]

The affected machines would finish all the installation process but stopped when loading updates around 40% t0 65% and would reboot and revert to Windows 7.

Disabling AV, running sfc/scannow, and check the installation file integrity didn't help.

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This post gave me an idea as I realized all affected machines are migrated from another domain while carrying over previous user profiles.

Here is what to do if you have a similar issue,

  1. Under HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList, check if you can find multiple user profiles with the same user Ids (but different SID).

  2. Backup registry, won't hurt to do a full and a partial for this particular path.

  3. Get SID of the current users or all users you want to preserve by running whoami /user in their session.

  4. Removed all but user profiles with the SIDs you just gathered.

  5. Reboot the machine to verify user profile association, so users can still log in and access their old files.

  6. Start upgrade.

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