I am trying to add the Mint 17-64 and it will not work and neither any other guests.
Failed to open a session for the virtual machine Mint17-64 Cin.
The virtual machine 'Mint17-64 Cin' has terminated unexpectedly during startup with exit code 1.
Result Code: E_FAIL (0x80004005)
Component: Machine
Interface: IMachine {480cf695-2d8d-4256-9c7c-cce4184fa048}
I get a similar error for all other guests.