My windows 10 is installed on m2 ssd (UEFI). Today i have installed ubuntu on separate sata ssd (UEFI). Now i cannot boot windows 10 from boot options list. If i choose m2 from list there is a message Reboot and Select proper Boot device or Insert Boot Media in selected Boot device and press a key Is there a way to boot windows 10? Thanks!
Update the available Operating Systems in the boot configuration:
Then reinstall the Boot Loader if it looks correct (you should see windows there):
sudo grub-install /dev/sda
Note that /dev/sda represents the first bootable drive. Re-installing the Windows Boot loader will destroy the Grub boot loader leaving you unable to access Linux.