14 days ago - AndrewT - Direct link
That is usually an antivirus app getting in the way. You need to make sure all these apps are in its exceptions lists:

stellaris.exe and dowser.exe (in the Steam Stellaris folder)
C:/users//AppData/Local/Programs/Paradox Interactive/launcher-v2.2021.10.1/paradox launcher.exe
C:/users//AppData/Local/Programs/Paradox Interactive/bootstrapper-v2.exe

IF that does not help, also set all those .exe files (EXCEPT stellaris.exe!) to run as the Windows Admin user.  

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