when i tried to open any session in virtualbox it shows these messages--
Failed to open a session for the virtual machine ubuntu.
The virtual machine 'ubuntu' has terminated unexpectedly during startup with exit code 1 (0x1).
Result Code:
NS_ERROR_FAILURE (0x80004005)
Component:
MachineWrap
Interface:
IMachine {85632c68-b5bb-4316-a900-5eb28d3413df}