I had a working dual boot system with Ubuntu 18.04 and Windows 10. After my holidays some days ago, the Window 10 does not start when selected in the grub2 menu. Instead, the grub2 instantly appears again.
I run boot-repair (recommended settings) in the hope it would fix the problem. It added additional menu entries for Windows in the bootloader menu:
- Ubuntu [was here before boot repair]
- Advanced options for Ubuntu [was here before boot repair]
- Windows UEFI bootmgfw.
- Windows Boot UEFI loader
- Windows Boot UEFI fbx64.efi
- Windows Boot Manager (on /dev/sdb2) [was here before boot repair]
All the Windows entry do not do anything, only the "Windows Boot UEFI loader" gives this ERROR:
Failed to open \EFI\Boot\grubx64.efi - Not Found Failed to load image \EFI\Boot\grubx64.efi: Not Found start_image() returned Not found
Here the report from boot repair.
Do you have an idea about the problem?