Well, amazingly this seems to have resolved it.
I suspect something went corrupt in the Startup options in steam (which I have never used, and was always empty, but that's the only thing I can imagine EU4 calling for Steam on.)
Fa la la la la lan
I suspect something went corrupt in the Startup options in steam (which I have never used, and was always empty, but that's the only thing I can imagine EU4 calling for Steam on.)
Fa la la la la lan