Virtual Memory/PageFile is space on your HardDrive that is Allocated/Used for the Windows Operating System to extend the function of your Physical RAM/Memory by Default. Windows creates a "Virtual" Memory space on your HardDrive by Default, In other words, this setting is normally On. It is suggested to Add 1.5 to 2 Times the amount of the Physical RAM/Memory that is inside your computer, and use that number to Allocate/Use for Virtual Memory/PageFile space on the HardDrive. An example would be, if I had 512MB of RAM/Memory, I would Allocate/Use 768MB of Virtual Memory space on the HardDrive and this would ensure that Programs could "Virtually" Use More Memory, in a sense, it would "Borrow" from the HardDrive Virtual Memory space. The Real Bottom Line today is, that if you have More Physical RAM/Memory (1 GigaByte or more) in your computer, the Less Virtual Memory/PageFile you need to Allocate/Use on the HardDrive.

In my opinion, it is a great idea to turn Virtual Memory off Completely, so the windows operating system and your programs can run completely in RAM/Memory, which enhances windows performance quite nicely, and it is stable. I have been actively using this setting for months, and it works great. I have tested, and used this Computer Enhancement on my Windows XP Pro computer. I have not tried this enhancement on Windows Vista or Windows 7 yet.