Today I've experimented the windows' blue screen of death...

My windows partition was f*ck up.
I tried many fixes, like boot from grub (which very complicated), boot from a usb with ubuntu live version and run boot-repair.

Bit finally I ended up, make a live usb of windows 10, (tried 6 times before finding the good way to do it with uefi bios) and reset windows without deleting my personnal files.

I'm pretty much proud of me right now.