Thanks for your response. Yeah, it's pretty grim.
I've gone to this site and downloaded the drivers and firmware as suggested.
Surface book 2. I've had it for a year.
The laptop will just shut down without any warning at all. I've recently discovered it's when battery 1 (the tablet battery) is at zero percent. Does anyone else have this disastrous problem?? The device was showing me 72% battery left when it turned...