Shut down during update

Morvariddaryayi Member Posts: 1 New User
I shut my laptop down during an update and when I switched it on again it said 'diagnosing your computer' etc and then a blue screen appeared. I clicked troubleshoot/advanced options/delete last quality update and got unable to delete last update, try reseting your laptop. Tried that while keeping my files, and was still unable to do that. Right now, most the useful things I tried my laptop is unable to do. I didn't try reseting the whole laptop completely—because obviously I don't want to lose my files. What should I do?