1. Install Required Packages

Ensure you have ALL VirtualBox components:

sudo pacman -Sy virtualbox virtualbox-host-dkms virtualbox-guest-iso

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2. Load Kernel Modules

VirtualBox requires kernel modules to create virtual networks:

sudo modprobe vboxdrv vboxnetadp vboxnetflt

Make modules load at boot:

sudo tee /etc/modules-load.d/virtualbox.conf <<EOF
vboxdrv
vboxnetadp
vboxnetflt
EOF

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3. Rebuild VirtualBox Kernel Modules

This is critical if your kernel updated recently:

sudo vboxreload

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4. Add User to vboxusers Group

sudo usermod -aG vboxusers $USER

Log out and back in to apply group changes.

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5. (Optional) Secure Boot Workaround

If you use Secure Boot:

sudo pacman -S virtualbox-secureboot
sudo virtualbox-secureboot enroll

Reboot and enroll the key in your BIOS/UEFI.

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Troubleshooting

• Kernel Headers Mismatch? Ensure linux-headers matches your kernel:

  uname -r
  sudo pacman -S linux-headers

• Still broken? Nuke and rebuild:

  sudo rmmod vboxdrv vboxnetadp vboxnetflt
  sudo modprobe vboxdrv vboxnetadp vboxnetflt