ok
first go into start
then into control panel on the left side it change it to classic view id it isnt already that way
then go into system in that file
then go to advanced tab
then the proformance box and click on settings
then another box should pop up
click on advanced tab on that 2
then go to the bottom and there should be virtual memorey
then change it to what you want remeber this is ram that you are not using, basically its extra space