Hello, I have new Macbook Pro i7 2.2 Ghz 8GB RAM (2 months old) and today my macbook twice got freezed with sound like "doot doot". I had to restart it by ON/OFF button. Than it was working OK. The temeperature of CPU is OK (about 60 Celsius). Do you know where is the problem? Picture of my screen is attached. Thank you for help!