Issues with the Cubase Menubar

I’m having problems with the cubase menubar. I can use it once, after that it does not respond anymore till I restart the application. The only thing that does happen is that the screen switches from fullscreen to window mode when I double tab the menubar. It goes from solid to transparent:

EDIT: Graphicscard drivers are updated. HiDPi is deactivated. Reaper and davinci resolve run flawlessly.

Issue resolved: The high contrast mode in windows 10 causes issues withe the cubase 10 menubar.