Error Code 0xe0000234 When Trying To Install Realtek

I bought new parts on 14th of Jan (i5 6600k, Asus Maximus VIII Gene, Corsair Vengeance LPX 2x4gb 3600 mHz). Swapped them with my old i5 760, Gigabyte motherboard and 8gb RAM.

The day after I installed my new components, Windows prompted me to activate Windows (apparently a new motherboard counts as a new computer thus a new license required). I ignored it, installed all the new drivers for my motherboard and CPU (Realtek worked fine BTW). 2 days later I couldn't stand the "Activate Windows" thingy at the bottom of my screen, so I decided so sacrifice my money to Microsoft to buy another license of Windows 8.1 Pro.

Installed Windows 8.1 Pro via USB (erased all data on SSD first) and upgraded to Win 10 from there.

So there I was on a clean Win 10. Used Ninite to install most common Apps, and went over to my motherboard's driver page over on ASUS's website. Downloaded the Realtek Audio Driver from there ((4.35) 6.0.1.7629), and tried to install it.

While I find the Realtek installer really outdated and janky, it normally works. The installer showed up and began extracting all sorts of files (mostly .dll files), the big blue window in the back popped up and after a while the message "InstallShield Wizard is installing..." popped up. It was then when I received the message: "Install Realtek HD Audio Driver Failure !! [Error Code : 0xE0000234".

So it's listed between Programs and Features, and I can also find it in the Device Manager, Under "Other Devices" as "Unknown Device". When I double click that the status reports:

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The drivers for this device are not installed. (Code 28)
Driver is not intended for this platform.
To find a driver for this device, click Update Driver.
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Clicked "update driver", manually searched for the drivers in the extracted setup folder, didn't work.