XPS 15 9570, Windows 10, dwm.exe, GPU overload

Hi everyone,

I am having serious problems with my Dell XPS 15 9570 and Windows 10.

Windows Desktop Manager (dwm.exe) doesn't use the Nvidia Geforce GTX 1050 Ti, rather it uses the Intel UHD Graphics 630 causing the GPU overloading of the latter one.

I have frequent peaks even when I switch from a window to another and I have to stop any activity. 

 No setting in the Nvidia Control Panel or the Windows graphic settings have worked to me. I even tried to create a new user, but it doesn't change the situation. 

Any suggestion would be extremely appreciated.

Best.
D.