Logic Brick Links are invisible! how to fix it?

I am in the logic editor and have made a Keyboard sensor, controller and actuator. I am dragging them together and the links work. But i cannot see that they are linked! how can i make it so a line is created between the logic bricks like usual?

Try zooming in or out. On my PC some zoom levels are incorrect.Other than that, I can’t suggest anything.

Go to the website of your graphics card manufacturer and ensure you have the latest drivers (don’t just assume an driver autoupdate will give you the latest)