this isnot that computer,,i just recieved the new one as that one wasnt working correctly its the top of the line xps 15, no its not top of the line gaming computer but as i was told just as good. I had no problem running sl on my old one. Sorry I dont know the correct lingo,,but my Avatar is a cloud. Yes all drivers are up to date. I have had dell working on this issue and they can not find the problem either. This is Model 4xn XPS 15 . I have followed the directions and it still does not work. Im not understanding as my old xps 15 worked fine with SL. Yes this is Intel core 17 but i dont understand why it wont work, it works on my 5 yr old desktop? And thank you for the help,,wish i could find the solution.....