I used bcdedit to add grub from Windows 10
Now This only works if I boot into BIOS first then proceed to boot
If I normal power on it directly boots in Windows
There is no EnOS entry in boot menu in BIOS
I tried to use EFI manager but it goes away after startup
I had the same problem some time ago. It seems a BIOS update sometimes leads to the BIOS not being able to detect current OS entries at all. So it’s not possible to boot it from the BIOS. In my case even booting with the arch iso, mounting drives and reinstalling/configuring GRUB didn’t do the trick.
I actually had to reinstall arch completely, which I found weird, because in the end it does the same as doing the GRUB reinstall. Just sharing my experience.