You can also try this page on the other computers:http://www.doesmybrowsersupportwebgl.com/
If using Chrome, and it's still slow, just type "chrome://flags/" into the Chrome address bar and make sure WebGL is not disabled (just search for "webgl"). If grayed out, then WebGL enabled (odd, I know ;) ). I remember this option being off by default a year or two back, so older versions may not have it on by default.JoyfulDreamer2013-04-24 05:17:14
Jack of all trades, and master of some.