Head over to the Windows Update tab on the left pane. Now, on the right side of the windows, click on the Check For Update button, make sure that you are connected to the internet.
Windows will search if there is any update. If there is, it will be downloaded and installed automatically.

If updating Windows doesn’t;t work to roll-back Widnows update to the previous build, firstly open up the Control Panel by searching it in the Windows Search Bar.

Click on the Programs and Features option, and on the next page, on the left top, click on the View Installed Updates option.

Now, from the list of the latest recent Updates installed on your Windows, select them and click on the Uninstall option. Then reboot your PC, and the number pad issue on your Asus ROG might get fixed.
Method 2: Reinstall ASUS ROG Number Pad Driver
If updating Windows doesn’t solve the Number Pad issue for ASUS ROG. Then you can try resolving the issue by reinstalling the Number Pad driver. Reinstalling your Number Pad driver will fix the driver if there is any damage or Corruption.
To uninstall the Number Pad driver, firstly open up the Windows Device Manager by searching it in the Windows search bar. Also, you can press the Windows Key + X buttons on your keyboard, then select Driver Manager from the Menu.
In the Device Manager, click on the View option on the Menu bar, then select Show Hidden Devices. This will make all the drivers visible in the Device Manager, even ASUS ROG Number Pad driver.
Now from the list, click on the downward arrow and expand the Keybaord category. Now, right-click on the ASUS Number Pad driver and click on Uninstall.

A prompt will appear. Click on Uninstall again to confirm it. Now you can just reboot your PC to install the ASUS ROG Number Pad driver, and it may fix the issue.
Method 3: Update ASUS Number Pad Driver and Selecting HID Keyboard Device
Reinstalling the Number Pad driver won’t work if it is a compatibility issue. Therefore you must update the driver automatically or manually. This means selecting the HID keyboard device.
To do so, firstly press the Windows Key + X on your keyboard, then select Device Manager from the menu. Now, expand the Keyboard category, right-click on ASUS Number Pad driver, and select Update.
Here, you can click on the Search automatically for the driver’s option if you want Windows to search for the latest driver on the internet and install it for you.
If you want to install the update manually or select the HID to keyboard device, select the Browse my computers for drivers option.

Click on the Browse button, select the latest driver, follow along with the wizard, and install it. To select the HID Keyboard Device, click on the Let me pick from a list of the available device option.

Lastly, select the HID Keyboard device for your ASUS ROG Laptop, click on the Next button, and install it on your PC. It would fi the Number Pad issue.
Conclusion
These are some of the common solutions to the ASUS ROG Laptop Number Pad driver problem. The issue might also be on the hardware level, so if your laptop is still under warranty, you should contact ASUS service to get it checked and fixed immediately.