Extract the contents of the downloaded ZIP or RAR archive. Move both ExtremeInjector.exe and DualCore.dll directly into your main Far Cry 4 installation directory.
One potential solution to fix Far Cry 4's dual-core issues on Windows 10 is to use Extreme Injector, a tool that allows users to inject code into games and applications. In this case, we'll use Extreme Injector to apply a fix that enables Far Cry 4 to run on dual-core systems. i--- Far Cry 4 Dual Core Fix Extreme Injector Windows 10