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Hi the game crashes after a few years and i have some weird grafic issus, i thought at first it might be a bug that had been the reason why i had posted there my issue before but i fear it might be more an issue on my side.
Run a Steam verify operation against the game, see if that finds anything to fix.
Otherwise 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/CK3/pdx_settings.txt .
From your Documents/Paradox/CK3/logs/ folder, attach system.log .
Im afraid your machine does not come close to the published hardware requirements for this game, in CPU and GPU at least.
You could try checking with Acer and Intel for an update to that 2015 video driver, but unless you have access to another machine with supported hardware, IMO you should seek a refund for this purchase.