You're either on win7 or you downloaded some dll from some site and put it in your game folder. If it's the first, upgrade to win10 since older versions aren't supported. If it's the latter case, delete the specific dlls you downloaded, and run this redist installer instead - restart PC once it's done.
https://github.com/ChxseH/Redist-Installer/releases/download/latest/Redist-Installer.bat