Help With Yamaha MG12XU

Hello there… I humbly ask for help… I bought a Yamaha MG12XU mixer and for 2 weeks now ive been trying to figure how to connect to my PC… I am using an HP 280 G2 MT, windows 10 PRO 64 BIT (10.0 build 10240) and have tried installing all the Yamaha usb drivers i could find on their website but still my PC can’t recognize the mixer anytime i insert the usb… I make sure to turn on the USB/LINE button but still the mixer only shows on my device manager as USB Headphone set… I really need help… Plus i want to know if the mixer can work without having to install Cubase AI because my package has no Access code to download the software, im thinking someone from the store might have taken it out… I will be very happy to know what to do…

Hoping to hear from someone soon… Thanks