So, I'm setting up my new win 10 machine (my first), and after transferring a bunch of stuff to my secondary drive, most of my folder pictures don't display correctly (they appear cropped at the top and bottom) ... unless their dimensions are a square. Never had this problem before, so I'm not sure if this is just a default thing, customizable or what. It's kind of a bummer though, because I usually make my folder pics 2:3 (720x1080 for HD).

That's my question, do I need to use 1:1 for folder pics?