First of all, sorry for my poor english.

From a couple of weeks, (after a download of 18gb I think) Witcher 3 stopped to run.
I press play, the game "start", but i see only a black screen for 1 second, the game returns in icon on the bar, but if I click there, doesn't work..

Please help me.

Thank you.

Cant help but i wanted to say ciao to another italian user on GOG :)

Try reinstalling VC++ redistributables, both x86 and x64.

Posting your system specs / operating systen might help a bit more. Are you launching the game from galaxy or directly from the exe?

problem solved.. (or a sort of solution)...

If I start the game from GoG Galaxy, doesn't work.
If I start the game from Nvidia Geforce Experience menu, it works...

Btw, thanks for the answers.
CIAO!