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#320
By the way @Martin, I forgot to tell the minor modification on your upgreade method using a VM: I thought that GSOD on tablet was hardware related and wanted to remove all drivers. I set VM up without network connection, used PowerShell to remove all Store apps, in order to be able to generalize Windows with sysprep to remove all drivers.
Before sysprepping, I exported all current drivers with PowerShell to a folder on C: drive. Sysprepped, booted to OOBE. On region selection screen, pressed SHIFT + F10 which not only opens Command Prompt but will also activate WIN key shortcuts. WIN + E to File Explorer, upgraded from ISO, upgrade now working because (I think so) Windows was only containing default built-in drivers and no chance to download anything more.
Last step when image is restored to tablet is then to import its drivers back.
Actually, I am not sure it is necessary to generalise as it does not seem to change the tablet drivers at all doing it via a VM (I am not sure they are even used as it seems to resolve drivers to your laptop drivers eg it uses my pc video drivers).
So when you copy vm back, it uses the same drivers as were before upgrading.
For my tablet, resolving drivers after oobe is a nightmare as it uses some special drivers that do not seem to be in the format that exporting them with powershell works (I have tried before). So I go to any length not to clean install or oobe on my tablet.