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I wasn't aware we even had a message like that anywhere ... does it look like it comes from our games or launcher? or from Windows or elsewhere? Maybe a screenshot would help.

And, when did this start happening?

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 your Documents/Paradox/EU4/settings.txt and pdx_settings.txt .
From your Documents/Paradox/EU4/logs/ folder, attach system.log , error.log .
 
Okay, so not every PDX game. Did you want me to move this over to HOI4 while you get those files?