TheLetterZ

Not exactly sure what you're saying is happening here but if you think it's a bug, please report it to our forums!
https://forum.paradoxplaza.com/forum/index.php?forums/hearts-of-iron-iv.844/

Please try what Caelus wrote :)

https://i.gyazo.com/51666eeb19e7080d61029e2625d6d7de.png this is what my stellaris launched like i have no idea why

Inttel i7 4th gen 3.6 ghz
Nvidia 770M
12 Gb Ram
Windows 10

The stuttering issue is known and being worked on! Devs wrote about it on twitter, will be in the next patch!