It's the graphics drivers. I am about 98% sure that updating them will fix the problem. I've seen similar screens from other players before. Updating their drivers fixed.
You don't need to rename maps/etc.: it's a scroll panel. You can scroll down to see other maps/scenarios. It's not so clear given the graphics aren't rendering correctly.
> ... Graphics drivers... were already updated as could be for the machine I was using.
That's what Windows wants you to believe! It always says it's OK, even when it isn't. You need to manually check and update them.
1. what's your graphics card name?
2. what's the graphics card driver version number?
I'll have a look and tell you where to update!