[2021] Game won´t launch

In the game launcher please set Display mode to windowed.THEN go here:

Latest supported Visual C++ Redistributable downloads

This article lists the download links for the latest versions of Visual C++ Redistributable packages. support.microsoft.com And run the x86 and x64 installers there.

IF that doesn't help, Has the game ever run OK on this computer? Or never?

IF NEVER:
Install ALL these Microsoft modules:

Download Microsoft Visual C++ 2010 Service Pack 1 Redistributable Package MFC Security Update from Official Microsoft Download Center

www.microsoft.com

Download Microsoft Visual C++ 2015 Redistributable Update 3 RC from Official Microsoft Download Center

www.microsoft.com

Download DirectX End-User Runtimes (June 2010) from Official Microsoft Download Center

www.microsoft.com (run dxsetup.exe after extracting from this download)

Add CK3.exe to the exceptions list of your antivirus app; ESPECIALLY if you have Windows Defender, add it to the Ransomware "Apps Allowed Through" list.


IF IT USED TO WORK:
Please do a full **clean** re-install:

- move any valued save games elsewhere
- "uninstall" in Steam-CK3
- manually delete both the Steam/SteamApps/common/CK3 AND Documents/Paradox Interactive/CK3 folders
- re-install game in Steam, run a Steam Verify when done.
- add CK3.exe to the exceptions list of your antivirus app; ESPECIALLY if you have Windows Defender, add it to the Ransomware "Apps Allowed Through" list.
- start the game with no mods active and test

In particular make sure there are no files or folders left under either the Steam CK3 or Documents CK3 locations, before installing again.


If those don't help:
DXDIAG is a program you run from the Windows search box on the task bar. 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 here your Documents/Paradox Interactive/CK3/pdx_settings.txt .
From your Documents/Paradox Interactive/CK3/logs/ folder, attach here system.log , error.log  

In the game's launcher, game settings, now set the game to fullScreen mode. Disable Vsync then set the refresh rate cap to 60.

Does thet help?  

Ulcomax said: Sometimes it runs in windowed mode, next time only in fullscreen.

I cannot explain that, it makes no sense really. I'm pretty sure you have a problem outside the game in some way, although quite what I cannot see as yet.

I notice this in that dxdiag:

+++ WER3 +++:
Fehlerbucket 1583869490661074995, Typ 4
Ereignisname: APPCRASH
Antwort: Nicht verfügbar
CAB-Datei-ID: 0

Problemsignatur:
P1: bad_module_info
P2: 0.0.0.0
P3: 00000000
P4: StackHash_0000
P5: 0.0.0.0
P6: 00000000
P7: 00000000
P8: PCH_84

Sadly Microsoft don't tell us which module they think is bad! But to me that points to a Windows problem. You might try this Windows repair tool:

Use the System File Checker tool to repair missing or corrupted system files

Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows 8.1, Windows 8, Windows 7 or Windows Vista. support.microsoft.com