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Dual Booting

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Info: This guide assumes you’ve completed the Arch install, KDE Plasma 6 setup, and Secure Boot configuration first. If not, see the Arch Index above.

Show Bootloader Menu
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Bootloader skips by default. Edit the config to add a timeout:

sudo nano /boot/loader/loader.conf

Uncomment and set:

timeout 5
default Arch Linux
#console-mode keep

Find Windows EFI Partition
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Lets find the windows EFI (either /dev/sdxN or /dev/nvme0n1nN):

lsblk
lsblk output

Mount the FAT32 EFI partition (replace /dev/sda1 with your own! It might be different):

sudo mkdir /mnt/temp
sudo mount /dev/sda1 /mnt/temp

running an ls on /mnt/temp shows the following:

ls /mnt/temp
ls output

This is exactly what we wanna see 😎 ls /mnt/temp/EFI should show Microsoft. If you see that, you have the right drive. If not, you can always sudo umount /mnt/temp and then sudo mount /dev/sdxN /mnt/temp until you find it.

Copy Windows Boot Files
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We can now copy /mnt/temp/EFI/Microsoft to our /boot/EFI:

sudo cp -r /mnt/temp/EFI/Microsoft /boot/EFI
cp ls output

DONE!
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We can now umount /mnt/temp and then reboot. Windows now appears in your systemd-boot menu alongside Arch. Secure Boot compatible! 🐧 Round of applause! You Use Arch, BTW! 🐧