Most K43S models feature a dual-graphics setup. You will need both the Intel Graphics Driver for power-saving tasks and the NVIDIA GeForce Driver (typically for the GT 520M or GT 540M) for gaming and high-performance applications.
For a more automated experience, you can use ASUS DriverHub to detect your specific hardware configuration and suggest personalized updates. How to Install Drivers Correctly asus k43s drivers
Asus K43SJ Drivers Download for Windows 10, 8.1, 7, Vista, XP Most K43S models feature a dual-graphics setup