Has the game ever run successfully on this computer? Or never?
IF IT USED TO RUN:
Please do a full **clean** re-install:
- move any valued save games elsewhere, and user_empire_designs.txt from /Documents/Paradox Interactive/Stellaris/ if you have made any custom empires or races.
- "uninstall" in Steam-Stellaris
- manually delete both the Steam/SteamApps/common/Stellaris AND Documents/Paradox/Stellaris folders
- re-install game in Steam, run a Steam Verify when done.
- start the game with no mods active and test
In particular you need to make sure there are no files or folders left under either the Steam Stellaris or Documents Stellaris locations, before installing again.
IF NEVER:
Let's look at a few things that cover the most common causes of this:
Do you see the game's launcher and the crash happens after that? Or is the crash before the launcher even comes up?
If it shows up, please change the game's resolution in the Launcher (gear icon, lower left) to match your computer's desktop - commonly 1920x1080.
Please go to C:\Program Files (x86)\Steam\steamapps\common\Stellaris\_CommonRedist\DirectX\Jun2010\ and run dxsetup.exe
Please go to C:\Program Files (x86)\Steam\steamapps\common\Stellaris\_CommonRedist\vcredist\2010\ and run vcredist_x86.exe and vcredist_x64.exe
Please go to C:\Program Files (x86)\Steam\steamapps\common\Stellaris\_CommonRedist\DotNet\4.0 Client Profile\ and run dotNetFx40_Client_x86_x64.exe
Does there exist a folder Documents/Paradox Interactive/Stellaris/ ? If not, most likely you have Bitdefender or ESET and that app is getting in the way. Add stellaris.exe to its Trusted List and you should be OK from there. This may also apply to other anti-virus or security apps.
Also if you have FRAPS or the MSI Gaming App installed, disable it as it clashes with this game.
If that doesn't help:
DXDIAG is a program you run from a command prompt or the Windows start menu 'run' dialog box (or 'search programs' in Windows 7 or later). After running it will open a window and start collecting info with a progress bar in the lower-left corner. When it completes click the 'save all information' button and save it to a file then attach that file here.
Please attach your Documents/Paradox/Stellaris/settings.txt.
From your Documents/Paradox/Stellaris/logs/ folder, attach system.log .