Windows boot loader missing after dual booting fedora 35

created custom partition
Device Start End Sectors Size Type
/dev/sda1 2048 1085439 1083392 529M Windows recovery environment
/dev/sda2 1085440 1290239 204800 100M EFI System
/dev/sda3 1290240 1323007 32768 16M Microsoft reserved
/dev/sda4 1323008 409602047 408279040 194.7G Microsoft basic data
/dev/sda5 409602048 949999615 540397568 257.7G Microsoft basic data
/dev/sda6 1113841664 1953521663 839680000 400.4G Microsoft basic data
/dev/sda7 949999616 950001663 2048 1M BIOS boot
/dev/sda8 950001664 952098815 2097152 1G Linux filesystem
/dev/sda9 952098816 1113841663 161742848 77.1G Linux filesystem

The “1M Bios Boot” partition is created only when a GPT partition layout disk is used to boot in a BIOS (legacy, in contract to UEFI) mode.

Please double check if you have boot Fedora Installer in BIOS mode or UEFI mode.

When I encounter issues like this, as it is a new install, I will:

  • Make sure Fedora Installer is booted in UEFI mode
  • remove the partitions created by the BIOS mode Fedora install (looks like /dev/sda7, /dev/sda8, /dev/sda9 in your case)
  • then install again in UEFI mode

After the installation, Windows usually will show up in grub2 boot menu again for me.


how to check and how to install in uefi mode
please guide me

Please goto your UEFI boot menu, and select the UEFI entry for Fedora installer to boot.
(On some of my machines, is if to press F12 during POST to invoke the UEFI boot menu)

Not all system’s UEFI UI are the same, so I cannot exactly tell you how to do it.

One way of doing it is, goto your UEFI firmware, and disable BIOS (legacy) booting mode.
(On some of my machines, it is to press F2 or DEL during POST to access UEFI settings.)

Some machines this is F8

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Can be f8, f10, f11, f12 or possibly more.
On my Asus laptop it is f10, on my desktop with ASRock mobo it is f11, and shows with the bios boot splash screen.