Okay, so I started seeing what the problem was with IE - the game just didn't show up. Easy way to solve it - refresh the page. Just hit F5 on your keyboard or push the two circling arrows and it'll reload the page. You might have to do it a few times, but refresh and wait a few seconds and the game should show up.
It worked for me, let me know if it works for you. If it doesn't, I'll look and see if I can duplicate your problem and fix it.
Dells are supercomputers, might have low memory but their processors are amazing. Unless your someone that saves years of pictures and documents and whoever knows what else, Dells are great.
Anyway, I've been refreshing alot too, it usually works. Just 1) I don't know how to get Firefox, 2) I've already personalized my Internet Explorer. Took me a while, too, I dun want all that to die. It would take forever to put it all back >.>