Nice, a fellow Kiwi
,
The Speccy report shows a clean running, no problem pc. But there is stuff all over about the ASRock AB350M Pro4 having freezing resetting problems. Perhaps the only solution is to get a different motherboard.
Perhaps return it and spend a little more for one of these boards
ASUS PRIME B450-PLUS ATX For AMD Ryzen 2nd/3rd Gen, Socket AM4. B450, 4X DDR4 DIMM, 1XM.2, 1XPCIE X16, 2XPCIE X1, 5XUSB, HDMI/DVI, LAN, Internal I/O: 1XUSB3.1, 2XUSB2.0