Information processing apparatus and method of controlling virtual machine

An information processing apparatus comprising:

• a memory;
• and
• a controller configured to control an operation environment of a virtual machine which runs on a hypervisor,
• the controller comprising:
• a change module configured to change the virtual machine from an operating state to a sleep state, in response to a logout request for an operating system in the virtual machine;
• a storing module configured to store first image data indicating contents of the memory used by the operating system in a nonvolatile storage device as an operation environment corresponding to a first user who logged into the operating system;
• a restoration module configured to restore the contents of the memory to contents based on second image data indicating a second operation environment corresponding to a second user, the second image data being stored in the nonvolatile storage device, when there is a user change request from the first user to the second user;
• and
• a return module configured to return the virtual machine to the operating state after the contents of the memory is restored to the contents based on the second image data.