Hello Everyone, I am new to the mac world and I just acquired a brand new macbook pro retina 13" and so far loving it. I have downloaded a BUNCH of crap on it the past few days and so far so good. I did notice one thing though, for some reason why I shut down the computer, it kind of fades (still see wallpaper) but then just shuts off. There is no spinner icon on the bottom like I had the first few days, so just not sure what it can be. It dims and then just turns off as if the power button has been pressed for several seconds for a hard shutdown. Today while I was listening to music, it just logged me off out of nowhere and was prompted to enter my password again. Would it be wise to just re-install Yosemite in order to avoid the fear of something being up with it? Also, I noticed that when I connect my Dell D3100 dock to the macbook in order to use two monitors that are in the dock, it all runs good, with the exception of any google chrome window is very flakey and studderish.