Hello. I recently bought a new (and, I believe, very powerful) computer but SL doesn't seem to run on it. Every few minutes I get very strange graphics, like large, flat, multicolored triangles that take up either some of the screen or all of it. I checked the minimum requirements for SL and my computer meets them. My graphics card is an ATI Mobility Radeon HD 4600 which Toshiba tells me is higher than the minimum required Radeon 9500. I have updated the drivers. I am running WIndows Vista. It is really frustrating because I invested in a good computer but now SL won't run correctly. Any advice or help would be very greatly appreciated. Thanks!