Hi, I have laptop ASUS K95V with Intel hd4000 and nVidia chip model. So I had successfully installed Yosemite directly from appstore. But 10 days I lost to find why second monitor I connected via DVI out, not working. Actually it starts to load, then in one moment it stuck on apple logo (where is progress bar loading) So becouse of that problems I wanted to try Niresh Yosemite and it was successful. I had second monitor working and all went just fine. But when I updated Yosemite from appstore to 10.10.5, I was unnable to load OS X again. With monitor or without, it stuck on apple logo. At the moment don't have idea what to do. Do you can help me about? Anyone?