I can play hours on end of demanding games with my pc but Launchbox has recently been the apparent cause of consistent, reproducible automatic shutdowns. Whenever I Add a game, go through the title search and start editing the notes it shuts the computer down without fail. I've saved three event log files after this has happened. I've updated my graphics card driver, reseated hardware, and am about to perform a clean install of LB 5.3, will update with the results of that later. I've always been in List view, too, will also attempt to reproduce in other views.