> Noted. The main reason I use MAMEUI is because it doesn't open the stupid secondary > cmd window in windowed mode. I haven't found a way to suppress that in regular MAME.
I have to admit to not noticing an extra cmd window.
I assume you're using -video auto or -video d3d currently? These require directx9 to be installed (not a standard feature with supported windows platforms). If this is all ok what happens if you try another video mode such as opengl or bgfx?