Problem Solved!

The cause of the problem was the energy savings in Windows Control Panel.

I changed those settings in control panel same as here: https://www.youtube.com/watch?v=GPxSQF6T_hM

Thanks.

Enterprise =/= LTSC Edition This is the official name "Windows 10 Enterprise 2019 LTSC" From Microsoft: "https://docs.microsoft.com/en-us/windows/whats-new/ltsc/whats-new-windows-10-2019" Was the OS fiddled with? Clean install. No mod or particular configurations. Just installed...

It seems that RVGL dont work on enterprice version of windows 10 (I'm using LTSC 2019). I got this error: "LoadLibrary failed with error 114: Routine di inizializzazione della di collegamento dinamico (DLL) not riuscita." In english it should be something like this "LoadLibrary failed...