Witcher 3 used to work, I had a geforce 780. I run Windows 10 - and recently upgraded to a geforce 980ti. I did a clean driver install and am running the latest drivers that came out last week. This is the first time I've tried to play The Witcher 3 with my 980ti and nothing happens when I click the green Play button in the GOG Galaxy client. Any ideas? Game ran fine in this same machine with my 780.

The green Play button doesn't change color or anything...I tried uninstalling and reinstalling, verifying...no dice.

figured it out - found the .exe outside of galaxy, ran it...had a vstudio redist error...even though it was installed - ran a visual studio redist repair and it seems to have fixed the issue.

Thanks for updating! Glad you solved it.