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Failed to open a session for the virtual machine 12.04.

The virtual machine '12.04' has terminated unexpectedly during startup with exit code 1 (0x1). More details may be available in 'F:\VirtualBoxVMs\12.04\Logs\VBoxStartup.log'.

Result Code: E_FAIL (0x80004005)
Component: Machine
Interface: IMachine {480cf695-2d8d-4256-9c7c-cce4184fa048}