I have 2 hard drives on my system. Windows is loaded in 1 drive entirely and in another drive, Manjaro is installed entirely. Windows was installed first then Manjaro. At the time of installing I have chosen the /boot folder to load my grub menu. After installation windows boot option is not there. But if I change my boot order from Bios to windows then windows starts as usual. Can I get some help to fix this problem? I also have updated the grub using sudo pacman -Syu grub & tried all other things from the forum on this topic. But nothing works.
What things?
In order for Grub to detect and add a Windows entry, both systems need to be installed the same way (both MBR, or both UEFI).
If this is the case, make sure GRUB_DISABLE_OS_PROBER=false is set in /etc/default/grub and update Grub. Do not reinstall grub package like you did, but execute:
sudo update-grub
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