PS: This is the file from the AUR: $ cat /lib/udev/rules.d/10-vboxdrv.rules KERNEL=="vboxdrv", NAME="vboxdrv", OWNER="root", GROUP="root", MODE="0600" SUBSYSTEM=="usb_device", ACTION=="add", RUN="VBoxCreateUSBNode.sh $major $minor $attr{bDeviceClass}" SUBSYSTEM=="usb", ACTION=="add", ENV{DEVTYPE}=="usb_device", RUN="VBoxCreateUSBNode.sh $major $minor $attr{bDeviceClass}" SUBSYSTEM=="usb_device", ACTION=="remove", RUN="VBoxCreateUSBNode.sh --remove $major $minor" SUBSYSTEM=="usb", ACTION=="remove", ENV{DEVTYPE}=="usb_device", RUN="VBoxCreateUSBNode.sh --remove $major $minor" This is how '60-vboxdrv.rules' from https://www.archlinux.org/packages/community/x86_64/virtualbox/ looks like: KERNEL=="vboxdrv", NAME="vboxdrv", OWNER="root", GROUP="root", MODE="0600" KERNEL=="vboxdrvu", NAME="vboxdrvu", OWNER="root", GROUP="root", MODE="0666" KERNEL=="vboxnetctl", NAME="vboxnetctl", OWNER="root", GROUP="root", MODE="0600" SUBSYSTEM=="usb_device", ACTION=="add", RUN+="/usr/share/virtualbox/VBoxCreateUSBNode.sh $major $minor $attr{bDeviceClass} vboxusers" SUBSYSTEM=="usb", ACTION=="add", ENV{DEVTYPE}=="usb_device", RUN+="/usr/share/virtualbox/VBoxCreateUSBNode.sh $major $minor $attr{bDeviceClass} vboxusers" SUBSYSTEM=="usb_device", ACTION=="remove", RUN+="/usr/share/virtualbox/VBoxCreateUSBNode.sh --remove $major $minor" SUBSYSTEM=="usb", ACTION=="remove", ENV{DEVTYPE}=="usb_device", RUN+="/usr/share/virtualbox/VBoxCreateUSBNode.sh --remove $major $minor" However using the AUR build with the rules file from community, the result is that USB is missing... $ ls -hAld /dev/vbox* crw------- 1 root root 10, 56 Jul 27 14:48 /dev/vboxdrv crw-rw-rw- 1 root root 10, 55 Jul 27 14:48 /dev/vboxdrvu crw------- 1 root root 10, 54 Jul 27 14:48 /dev/vboxnetctl ...and I got rid of "Failed to open "/dev/vboxdrvu", errno=13, rc=VERR_VM_DRIVER_NOT_ACCESSIBLE", but the Windows 7 guest still crashes, if I try to access the shared folder.