Do you close all other applications and quit all the icons next to your clock? They all use memory to keep them running and I have solved problems with friends games which was as simple as closing all of those to free up some system resourses! An upgrade on RAM would help, so would a PSU - but neither guarentee it will work.
QUOTE: "Dell makes annoying power supplies that only work with Dells, meaning you have to order another garbage PSU from Dell"
Does that mean he can not upgrade a PSU to a non-dell brand?!!