The Intel Driver Update utility does not support all drivers. You need to go to the downloads page for your NUC (here: NUC5PPYH Drivers & Software) and download and manually install the remainder of the necessary drivers.
Here is a list of the drivers you should have installed.
Wireless: Intel® Wireless Technology-Based Driver for Intel® NUC
Chipset: Intel® Chipset Device Software for Intel® NUC
Audio: Realtek* ALC Audio Driver for Intel® NUC
Graphics: Intel® HD Graphics Driver for Windows 7*/8.1* for NUC5[x]PY
Bluetooth: Intel® Bluetooth drivers for Windows 7*/8*/8.1* for Intel® NUC
Serial IO: Intel® Serial IO Driver for Windows 8.1*
LAN: Realtek* LAN Driver for Windows 8.1 for NUC5[x]PYH
Infrared: ITE Tech* Consumer Infrared (CIR) Driver for Windows 8.1* for Intel® NUC
Optionally, depending upon your usage, you may want to install these:
Intel® TXE: Intel® Trusted Execution Engine Driver for NUC5PGY/NUC5[x]PY
Intel® Ready Mode Technology for Intel® NUC
NFC: Near Field Communication GPIO Driver for Windows 8.1* for NUC5[x]PY
Hope this helps,
That is really good to hear, keep us posted.
Just bear in mind that Linux Mint has not been validated to work with this NUC, see here for the Supported Operating Systems for Intel® NUC Products. If you have any trouble with your NUC and Linux Mint I would recommend heading to https://forums.linuxmint.com/.