Try running the game offline to see if Steam is the cause of your issues. Do this by simply exiting Steam completely and run "Program Files\Steam\SteamApps\common\Europa Universalis IV\eu4.exe".
Various game crashes
Try running the game offline to see if Steam is the cause of your issues. Do this by simply exiting Steam completely and run "Program Files\Steam\SteamApps\common\Europa Universalis IV\eu4.exe".