Update

First of all, thanks to tutor Phil, who suggest me to make backup asap. If I didn't do it, I would lost all my data! (Now, I'm little bit paranoid, because I backup every hour :) ) I've got my laptop back yesterday. Service didn't change graphic card, because it passed all test. However, I found solution to avoid color dumps - downloaded MSI afterburn and reduced core clock from 675 to 625. Now it works fine. However, I still lost 2 weeks. :(

Anyway, reinstalled everything and working hard.