I have encontered a problem in the game, while i press W and A on the keyboard and turn the mouse either right or left. It laggs a bit, enough to disturb the experience. If iam going to play this i want to do it wihtout this. Has anybody experienced this problem? i have the settings on as high as it goes. But, when i lower the setting the problem still remains.

Did you try switching off vsync? You'll probably get screen tearing without it, but it's worth checking out. Are you using wireless keyboard and mouse perhaps?

I assume you're running the galaxy client?

Could you please click on your Witcher 3 game and click more > settings
disable in-game overlay and try again

Picture attached highlights what im refering to

I had the same problem

turning off the GOG overlay fixed it for me

Not even turning off the GoG overlay fixed it for me. I tried all the solutions out there and none worked.

The only thing that worked for me was to run it standalone directly from the folder, meaning not through the GoG client. Kinda sad that CDProjekt never bothered to fix such a glaring issue that affects so many people.

GOG is an online service that acts as a caretaker, library, storefront, and storage facility for games. I'm not sure that CDProjektRed runs or owns it.

In any case, I am happy that you were able to solve your problem Graal. However I think that since it doesn't affect every user of GOG and W3 the way it affects you (for instance I have a GOG issue, but it is only with the overlay, not the client overall), it's hard to say CDProjektRed is to blame. Perhaps they are, but it seems to me that there's a lot of variables to consider and neither a developer or host service is really odds-on to have taken every user configuration into account. In your case, since leaving the GOG client out of the picture solved the problem, I'd look into how your machine interacts with the client.