I installed Ubuntu 18.10 alongside Windows 10.
When I boot, I see grub, and I can boot into Ubuntu. But if I choose Windows from the grub menu, I get an error message saying that BCD is missing. Now, I can fix that with my Macrium Reflect CD, if I boot it EFI (my AMI BIOS is very temperamental about booting removable media as EFI). It fixes Windows, but then, grub is gone, and the only way I can get to Ubuntu is by manually selecting it in BIOS.
I tried running boot-repair. When I run it from my Ubuntu installation, it complains that I did not boot efi. If I run it from DVD, either my BIOS fails to boot it EFI, or it fails to repair.
I tried changing BIOS from efi to legacy, but that didn't help much. Here is log:
