Far Cry 4 Dual Core Fix is a community-developed workaround that allows players to bypass the game's hard-coded requirement for a processor with at least four threads. When Far Cry 4 launched, it famously displayed a permanent black screen
Part 1: Why Does Far Cry 4 Refuse to Run on Dual Core?
for users on budget-friendly dual-core CPUs, even if those processors were otherwise powerful enough to handle the game's graphical demands. The Technical Barrier
not
Do use the injector yet. Launch the game via Steam/Uplay. You will likely see the black screen or a frozen splash image. Let it sit for 10 seconds, then close the process via Task Manager.