The virtual memory on your computer should be adjusted to provide optimum performance, and minimum fragmentation. While this guide is written for Windows XP, the changes and settings are also fully applicable to other Windows operating system (however the locations of the menus in question may be different). To properly adjust your virtual memory, you need to know how much physical memory, or RAM, is on the system. You can find this by going to Start-> All Programs-> Accessories-> System Tools-> System Information. Within the System Summary section of the system information window, find the Total Physical Memory. This is your RAM.