The new Windows logo is out of perspective. Someone teach MS designers some basic perspective. Fixed it for ya.
Edit: There’s a bit of debate whether or not windows are square. The archetype of a window that MS followed is a four quadrant window, usually composed of squares: 
I believe this was the intended design. There are rarely rectangular quadrant windows that are wider than they are tall.
Also, my good friend Linda Dong noted that the horizontal gap should be tapering, as well.
Edit 2: Just learned that it was actually designed by Pentagram’s Paula Scher. How embarassing.