- Find or create a bootable USB drive with Windows. You can download an ISO on official Windows website.
- Boot in the drive, choose the installator's language and after that press "Restore system".
- Open
cmd.exe
- Find how the partition with Windows is marked
diskpart
> LIST VOLUME
> EXIT
- Let's say it's a C disk (as usual). Now you need to run
bcdboot
program.
bcdboot C:\windows
Now you can close cmd.exe
and reboot.