After the last update of the graphic drivers I am no longer able to set a custom resolution in windowed mode. I can only rescale the window with a fixed aspect ratio, while before I was able to set 2/3 of the screen width with the maximum height, for example.
I have tried already to modify manually the Config.wtf file, but with no effect. The resolution values get overwritten.
I have also tried to change/reset the driver setting, but I am no able o find the 3D settings as recommended in an other post. For information I have an Intel UHD Graphic 620.