12 days ago - AndrewT - Direct link
In the game launcher please set Display mode to Borderless. THEN go here:
support.microsoft.com

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, also 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 www.microsoft.com

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

www.microsoft.com www.microsoft.com

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

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

Add EU4.exe to the exceptions list of your antivirus app; ESPECIALLY if you have Windows Defender, add it to the Ransomware "Apps Allowed Through" list.

Also if you have installed RivaTuner, RadeonPro, or a gaming VPN app called Evolve, or the MSI Gaming App, or Duet, disable it as it clashes with this game.

IF that doesn't help:

Please attach here your Documents/Paradox Interactive/EU4/settings.txt and pdx_settings.txt .
From your Documents/Paradox Interactive/EU4/logs/ folder, attach here system.log , error.log .  
11 days ago - AndrewT - Direct link
What happens if you run eu4.exe directly, which bypasses the launcher?

And what antivirus app do you use?  
10 days ago - AndrewT - Direct link
Tiyanki_ said: Nothing happens if i try the launcher.
My question was, what happens if you run eu4.exe directly (from File Explorer) - not the launcher. Any Windows error show?  
9 days ago - AndrewT - Direct link
I see you have Steam too. Our similar game Crusader Kings 2 is free to play there now. Does it have a similar problem?  
8 days ago - AndrewT - Direct link
Then I don't know what's wrong on your machine to cause this, sorry. Please install and run the free utility Speccy. Send its output to a text file and attach that here, thanks.