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VirtualBox fails on startup

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Result Code: NS_ERROR_FAILURE (0x80004005) / Kernel driver not installed (rc=-1908) are the errors displayed when the kernel driver needs to be recompiled. It usually happens when updates to Ubuntu are installed.

The kernel driver can be recompiled by issuing one the following commands:

sudo /etc/init.d/vboxdrv setup

or

sudo /sbin/rcvboxdrv setup

The former one works for Ubuntu versions prior to Ubuntu 16.04. If the first one is not found on your system, try the second one.

VirtualBox does not run or runs slowly under Windows 8

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Windows 8 comes with Hyper-V pre-installed. ¬†If you want to run Virtual Box, you must completely uninstall Hyper-V through the “Add and Remove Programs” option from the Control Panel. ¬†Failing doing so will result in:

  • Virtual Box will display error messages when starting up your Virtual Machine
  • You will not be able to change the number of processors in Virtual Box
  • You virtual machine will run very slowly because of the inability to increase the number of processors
  • Hardware acceleration will be disabled

Stopping the Hyper-V service is not enough.

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