I already have launched the game, but it was before I updated it to 1.11, then I couldn't start so I reinstalled and now I can't lauch it again.
First i thought it was because my laptop's specs:
i5-3210M CPU 2,50GHz
NVIDIA GeForce GT 630M
8GB RAM
windows 7

but I DID launch the game earlier, it didn't work smooth but it worked, so I dodn't see why it doesn't start now.
The error I get: Program Thw Witcher 3 has stopped working.

I have the same problem, but my pc is a desktop I5 6600K ,16 Gb DDR4, Nvidia GTX 970 and windows 7 64 bit.
The problem is the same i can't launch the game after reinstall game and Gog Galaxy client ( for format )