Tu mas nejake popisy co sa pocas bootu robi
https://bbs.archlinux.org/viewtopic.php?id=168502
mozno ti to pomoze. Skontroluj si hlavne tie subory na bootoddieli, o ktorych je tam rec.

Chances are the first entry is launching the boot loader file EFI/Microsoft/Boot/bootmgfw.efi, whereas the second one is launching the fallback boot loader file EFI/BOOT/bootx64.efi. Ordinarily, the fallback boot loader is used on removable disks or as a fallback in case the NVRAM entries get erased. Therefore, Microsoft installs copies of its boot loader both where it should officially go (in the EFI/Microsoft directory tree) and in the fallback position, to ensure the computer is bootable should a problem occur with the NVRAM.