1. A method comprising: loading a primary operating system into a primary physical address area of a main memory in a tablet mode; loading a secondary operating system into the primary physical address area; concurrently running the loaded secondary operating system in a virtual environment in the primary physical address area and running the loaded primary operating system in a physical environment in the primary physical address area, wherein the primary operating system has a right of access to a processor; and acquiring the right of access of the secondary operating system to the processor and running the secondary operating system in a physical environment, wherein acquiring the right of access of the secondary operating system comprises copying a memory image of the secondary operating system loaded in the primary physical address area to a secondary physical address area of the main memory via a suspend state, and wherein acquiring the right of access of the secondary operating system occurs in response to a switch from the tablet mode to a clamshell mode, and wherein: copying the memory image of the secondary operating system includes: causing the computer to make a transition to the suspend state; and executing a system firmware in response to the computer resuming from the suspend state, wherein the system firmware reads data from a shared memory area and performs a copying function based on the data read from the shared memory area.