I tried to click on Poker Stars app to get a game. It updated and when done it asked me for a pw. I entered it but it gave me error message. I restarted the lap top and it has been restarting itself ever since. I took the battery out, no A/C, and still doing it. It's now been about 5 hours. I took the battery out again and the laptop turned off automatically. I waited and plugged it to the AC and same thing. 15" MBP Unibody circa 08-09.