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The process of copying the contents of RAM on the HDD is called paging. Operating systems do this automatically with lesser-used applications running in RAM to free up RAM for the active programs. In short, virtual memory (often called virtual RAM) = swap files (often called page files). This technology is also used for crash recovery. Remember, RAM loses its data when the PC has no power. In a secure environment, it might be wise to eliminate the virtual RAM, because the HDD has a copy of what was last in RAM before it was turned off. RAM calls this area of the HDD virtual RAM. The HDD calls this data swap files. In general, you should let the OS determine how much of the HDD to allow for this. If you set it up manually, it should be at l....