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The following chain of commands works when Windows is installed in UEFI and UEFI firmware is present. If Windows is installed in UEFI and that in combination with BIOS firmware the command will not work. How do I have to customize the command?

search --set=root --file /EFI/Microsoft/Boot/bootmgfw.efi
chainloader /EFI/Microsoft/Boot/bootmgfw.efi
boot

After this command follows the error: Blue screen with "Your PC/Device needs to be repaired" However, Windows boots normally if I do not want to boot Windows from the grub console using grub commands. So it must be the commands.

I have tried the following adjustment:

search --set=root --file /EFI/Microsoft/Boot/bootmgr.efi
chainloader /EFI/Microsoft/Boot/bootmgr.efi
boot

then the error message "cannot load image" appears

Thank you for support!

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