RE: Studio XPS 9100 Crashing/Locking Up
I had the same problem. Ran diagnostics at boot up (F12 at the Dell Splash screen) got an error message (0123 I think) that indicated my memory sticks might not be seated properly. Took off the side panel and sure enough one wasn't seated all the way. I haven't crashed since but it's only been 1 day. We'll see.