go to the control panel, system and security, then system, next advanced system settings.
a new window should open, go to the advanced tab, under performance click settings
go to the tab advanced you should see a option for programs and background services select programs,
go to virtual memory and click change, add as much ram as you want/have, apply then ok, somtimes you will be asked to restart your pc, so be ready for it
I think hard drive ram might be slower then normal ram but I might be wrong. . .
If you play mc I can tell you how to add more ram to it when you play it since default ram is 1gb.

