Macbook Random Shutdown

I have a macbook that i bought from Apple Store Ginza, in Tokyo, in June. 3 weeks ago the crashes start to take over my macbook. I live in Romania, and next week i will take the macbook to an local Apple Store, i`m glad i have applecare. Anyway i have to say that Apple has a VERY BIG PROBLEM with QUALITY CONTROL these days. To many hardware problems from a company like Apple. I never thought Apple could have so many quality issues with their portable machines. Looks like the iMac and MacPro are doing well.