Sorry Paul to answer in your thread, but it seams the same.
BIOS latest, 3.01
My ASUS latest from MS App store, can't run to check version, but in Reliability history it say ver 220.127.116.11. as faulting app
ASUS System control Interface is also latest 2.2.31, installed after problems started. It was 2.2.30 before
Update: after system updated today, cleaned temp files, downloaded MyASUS from Store again and it works normally.
Have no idea what cured it. Maybe it was bad connection to Asus web pages - yesterday was awful