I have been trying to fix this issue for quite a while... atleast for 7hours.. by reinstall the game on steam. Over and over. It get stucks between 2%-6% and won't install any further. It says on the screen that installing has been canceled and manuely going back to uppdating again, over and over. Tried restarting my laptop, same all the times.. but nothing still works..
What is your operating system?
If you could.
Core i7 7700HQ / 2.8 GHz
Win 10 Home 64-bitars
16 GB RAM - 512 GB SSD + 1 TB HDD
15.6" IPS 1920 x 1080
GF GTX 1050 Ti
The only thing I can think of is check if you have enough storage space for it, or try installing it to a different location. A while back they said:
"Important: please do not install it in your Program Files or Program Files (x86) folders, as it cannot be started from there."
Other than that you can try going through their general troubleshooting steps in the sticky post of "List of known issues".