Installed VirtualBox 4.3.20 (install file = VirtualBox-4.3.20-96997-Win.exe) and downloaded the latest Guest Additions as an update from VirtualBox 4.3.12.
Host: Windows 7 (64-bit) Home Premium SP1, AVG Free Edition 2015, running in 16GB RAM
Guest O/S: Kubuntu (64 bit) configured to run in 8GB RAM
Installed VirtualBox OK, but get the following error when trying to start the VM:
NtCreateFile(\Device\VBoxDrvStub) failed: 0xc0000034 STATUS_OBJECT_NAME_NOT_FOUND (0 retries)
Driver is probably stuck stopping/starting. Try 'sc.exe query vboxdrv' to get more information about its state. Rebooting may actually help.
(RC=-101)
Make sure that the kernal has been loaded successfully
Followed by a second VirtualBox - Error:
Failed to open a session for the virtual machine Darktable-64
The virtual machine 'Darktable-64' has terminated unexpectedly during startup with exit code 1 (0x1). more details may be available in 'C:\Users\Paul\VirtualBox VMs\New group\Darktable-64\Logs\VBoxStartup.log'.
Details
Result Code: E_FAIL (0x80004005)
Component: Machine
Interface: IMachine {480cf695-2d8d-4256-9c7c-cce4184fa048}
I had previously tried upgrading from a VirtualBox 4.3.12 installation but reverted to 4.3.12 when the upgrade failed in a similar way to above.
Any suggestions on how I resolve the issue would be welcome.
Kind regards, Paul