In Paradox defence they released a patch pretty quickly once it was released to the masses with miriad of different hardware configs.
To be honest, they prob should have just beta early released it.
This way they could have caveated any issues and allowed the feedback to refine the codebase.
£70 ish quid for the premium edition to run like shite takes the biscuit.
Just OEM key it. Alternatively watch LinusTechTips. In sure they did a video of using Windows sans license.