Chosen Solution
The Surface is stuck between Windows 8 and 10 so needs factory reset running, but there is data on it which needs recovering first. Can you take out the hard drive (SSD) to recover the data, then put it back in and reset?
It can be done but is very difficult and would not recommend doing it . Heres a teardown guild that may come in handy https://www.youtube.com/watch?v=5ZJn2YCC…
It is very difficult to disassemble the Surface without damaging the screen in the process. I suggest you boot off a USB key (with Linux) and transfer your files off to an external hard drive.
