OS: Windows 7 64 bit
GPU: GeForce GTX 780
CPU: i7-2600 3.4GHz
I open up blender 2.78, it works for a tiny fraction of a second, then it freezes. No white screen or visual glitches, it just becomes a static screen where I can't click anything, and the mouse cursor display a "buffering" icon.
Blender 2.77 works fine.
Blender 2.78 32 bit version oddly works fine aswell.
I tested on a Windows 8 (GTX 980 ti), in my full time job place, it worked.
I updated my graphic card driver, bug still persists however.