Step 1 -> Click the button to download ASUS K43SJ Keyboard Driver Utility and install it on your Windows 10 64 bit.

Step 2 -> Click the "Start Scan" button to scan your Windows 10 64 bit system drivers and find the out-dated Keyboard drivers automatically.

Step 3 -> After the step above, the out-dated Keyboard drivers and other drivers will be found. Click the "Download" and "Install" to update your K43SJ Keyboard drivers.