We have updated our Community Code of Conduct. Please read through the new rules for the forum that are an integral part of Paradox Interactive’s User Agreement.
You are using an out of date browser. It may not display this or other websites correctly. You should upgrade or use an alternative browser.
Your graphics settings might be causing trouble. Try these steps:
Outdated graphics card drivers: try downloading and installing the latest drivers for the graphics card.
Incompatible graphics card settings: try running the game on Fullscreen instead of Windowed mode. From the game launch screen, click the Settings link to open the Graphics display mode. This menu shows selections for: Display mode, Display monitor, VSync, and Fullscreen resolution. The Display Mode allows three choices: Fullscreen, Windowed, and Borderless. Choose the Fullscreen option. Set the VSync toggle to On. Set the Fullscreen resolution to your monitor's native resolution such as 1920x1080.
Incompatible graphics card settings: try manually editing the settings.txt file by first navigating to the settings.txt file (typical file path C:\Users\Documents\Paradox Interactive\Hearts of Iron IV\settings.txt). Then open the settings.txt file and manually change the text to read as follows: size={ x=1920 y=1080 }, fullScreen=yes, borderless=no, and vsync=yes. Caution: Only change the size, fullScreen, borderless, and vsync text settings. Be sure to backup your settings.txt file before making any changes. Note: Be sure to use your monitor's native screen resolution for size such as x=1920 y=1080.