Hi i just bought Game of the year edition and i cant run it
Is not about req. hardware . I activate game with code on GOG and download it but when i press play game is try to run but if few moments is back to button play

Did you install also vcredist_x64.exe and vcredist_x86.exe ? What about PhysX?

I have the same error the only way for me to launch the game was unistalling the GOG app but I if try to click on the screen or change to another app it closes again

Another things is, that Witcher 3 must not be blocked by firewall. Can you check it, please?

I must launch game from w3.exe without gog app .
Btw. nice app gog galaxy xD

Jesus Christ, doesnt work again . Launching without gog galaxy worked yeasterday but now game doesnt launch again -_- Somebody know mayby sequence to start it ? xD

Make sure that you've placed the game and all of the .exe applications for Galaxy onto the whitelist for all of your PC security, not just the firewall... which, frankly, shouldn't affect your game at all, given the fact that it's a single-player game and a firewall is more of a protection against network-based attacks.

If that doesn't work, you could always try uninstalling it from Galaxy and then reinstalling it via the offline installers, which you can find by accessing the "Games" section in the drop-down menu that you get when mousing over your name in the top menu bar on this site. They'll be in multiple pieces, you'll need all of them (except for the patch at the bottom of the list). If you do this, make sure you run it in administrator mode and whitelist it on your antivirus.

Also, it might help to list your PC's specs. There's a possibility your PC might not meet the system requirements or some incompatibility might exist somewhere.