So Witcher worked perfectly about a week ago, launching from nvidia experience. Now when I try to launch I get nothing happening and when I try to launch again I get this a message "Game is already running" But nothing comes up the game is running in the task manager but I am unable to play it.

So the game starts fine in the GOG client, which is fine. However, I want to try out mods for the first time, I never tried them so I installed Nexus Mod Manager and everything is working, however when I try to launch the game from the Nexus Manager I get the same problem as with nvidia experience.

Can anyone help me here? I want to try out some mods but I sort of goof up tricky install and Nexus does it for me but I can not ever get the game running.

Any help would be greatly greatly appreciated as I have been rattling my head on this for over a week with zero answers.

If the game starts fine through Galaxy, install your mods and then run it through Galaxy. Why would you want to use that resource hog nVidia Experience?

The nvidia experience thing I not concern about, I am concerned now the Nexus item is acting the same way. I am not up to par with mods and dont want to break anything. The nexus client installs and sets up modes for me. But I run into the same problem as the nvidia experience. I only mentioned the nvidia experience to relate the problem.

My advice stands: if, as you say, the game runs fine through Galaxy, install your mods through the Nexus manager, close that down after installation, then run the game through Galaxy.

Thanks but the nexus manager does not seem to install them in a mod folder. it handles the mods sort of like fontbook does with fonts, like you can turn them on and off but they live in some other folder

The Nexus manager installs them to the 'Mods' folder. If you haven't got a 'Mods' folder you need to create it in your main game installation. Let's assume that your game is installed to C:\Games\, then you should make a new folder called 'Mods' (no quotes) like so:

C:\Games\The Witcher 3 Wild Hunt\Mods\

Once that folder is in place the Nexus manager will place all mods in their own folders. You will get a bunch of folders all beginning with 'mod...', for example

C:\Games\The Witcher 3 Wild Hunt\Mods\modNumber1\
C:\Games\The Witcher 3 Wild Hunt\Mods\modNumber2\
C:\Games\The Witcher 3 Wild Hunt\Mods\modNumber3\

If your game is installed to Program Files (x86), uninstall it and reinstall outside of the protected 'Program Files' folder.

Thank for the help I will look into this. really thanks againf or all the help!