same thing happened to me years ago. it was at that point I made the decision to never dual boot.
I have two dedicated windows devices, and the rest are Linux.
I did,for a time, dual boot by installing windows on an external m.2 drive over TB3 and had a grub entry in for it. I never updated windows and frankly only used it about once a month for work related bs.
I dual boot grub+linux from a wholly separate drive set as the boot drive, windows boot loader is unused, untouched, isolated on the windows drive.
Windows update still broke grub.
Pull my hair out for a few hours trying to find a fix, about to try something but have to reboot one last time.
Everything is fine, back to normal.
same thing happened to me years ago. it was at that point I made the decision to never dual boot.
I have two dedicated windows devices, and the rest are Linux.
I did,for a time, dual boot by installing windows on an external m.2 drive over TB3 and had a grub entry in for it. I never updated windows and frankly only used it about once a month for work related bs.