Windows overwrote GRUB boot menu entry §

For Manjaro

# reinstall kernel headers
sudo pacman -S linux515
 
# reinstall efi grub entry
grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=manjaro --recheck
 
# update grub menu
sudo update-grub
# or with
sudo grub-mkconfig -o /boot/grub/grub.cfg
 
# detect boot menu entries
sudo os-prober