Hey friends.

I bought a used Microsoft Surface Pro 6 . Good condition, only downside is that the xHCI complient USB Host Controller gives code 10.
I have tried everything that seemed immediately obvious to solve this, like driver updates, roll back OS versions, run all MS's diagnostics tools etc.

The kicker: It works in UEFI just fine.
It works in Grub2, too.
I can even boot off a USB recovery drive thumbstick. However, after it has loaded the image and starts the OSs drivers, it fails.
(This is actually how I got Windows back on it, by putting...

Just a hobbyist trying to get a Surface Pro to function so I can put it on a CNC Router.
Got your typical 90s kid level of computer skills and tried my hands on electronics repairs and working with coding MCUs.