The guide worked for me, but let me share some more details on how I exactly did it:
1. Uninstall the driver for "ASUS System Control Interface V2"
a. Open Device Manager by clicking on start and typing “Device Manager” on search bar
b. On Device Manager, expand “System Devices” and right click on ASUS System Control Interface V2
c. Click “Uninstall device”. You will see a pop-up that says “Warning: You are about to uninstall this device from your system.”, and below that message is a checkbox that says “Delete the driver software from this device.”. Go ahead and tick on that box and click UNINSTALL.
d. Do a reboot/restart.
2. Do a fresh install of the "ASUS System Control Interface V2":
a. Open your MyASUS app, and click on “New Updates” or go to Software Update tab accessible thru the left side of the MyASUS App.
b. You will then see two tabs on the right side: Live update and “Driver & Tools”. Click “Driver & Tools”, then scroll down to “Others” category and you will find ASUS System Control Interface V2 under this category. Click on the topmost one as this should be the latest version.
c. While waiting for this to download, go to win-rar.com to download the appropriate WINRAR version for you. Install this first before installing the new "ASUS System Control Interface V2".
d. After downloading "ASUS System ControlInterface V2", open file location, and right click on the file and click “Open with WINRAR”.
e. Click “Extract to” on the top menu icons, and extract the file to wherever you please.
f. Open the extracted folder, and right click on “Install.bat” and click “Run as administrator”.
g. It will open a command prompt window and it might take a while, but just be patient
until it closes by itself.
h. Reboot once, and if you wish, reboot again (I had to reboot twice as I seem to have
encountered a glitch with the hotkeys, but was fixed on my second reboot)
Hope this helps!