@ Lonnie Lee Best - I applied what you have suggested at #39. But when I launched VirtualBox, it says as under:
RTR3InitEx failed with rc=-1912 (rc=-1912) The VirtualBox kernel modules do not match this version of VirtualBox. The installation of VirtualBox was apparently not successful. Executing '/sbin/vboxconfig' may correct this. Make sure that you do not mix the OSE version and the PUEL version of VirtualBox. where: supR3HardenedMainInitRuntime what: 4 VERR_VM_DRIVER_VERSION_MISMATCH (-1912) - The installed support driver doesn't match the version of the user. AND ALSO THE FOLLOWING: Failed to open a session for the virtual machine Windows 7. The virtual machine 'Windows 7' has terminated unexpectedly during startup with exit code 1 (0x1). Result Code: NS_ERROR_FAILURE (0x80004005) Component: MachineWrap Interface: IMachine {85cd948e-a71f-4289-281e-0ca7ad48cd89} -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1736116 Title: Host with kernel 4.13 freezes when starting a VM with VirtualBox To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/virtualbox/+bug/1736116/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs