I recently built my new machine with a ROG Z270G board, a Samsung m.2 SSD, and loaded Windows 10 v 1607 to it. No problems. As soon as a trial version of the new W10 v1703 (Creators version?) came out I upgraded manually to it. No problems except one - my bluetooth was now missing. I mean REALLY missing - nothing in Device Manager, nothing in Programs and Features. I couldn't reinstall or update the driver because it simply was no longer there. I went to the ROG Support site and downloaded the latest version of the Bluetooth driver from Asus, the Qualcomm Atheros Bluetooth Installer and ran it. It created a new folder in Programs (x86) - Bluetooth Suite - but seemingly nothing else - nothing in Device driver, and only the new entry in Programs and Features called Qualcomm Atheros Bluetooth Installer - but no bluetooth program.
It also installed a new service in Services called Atherosvc which I assume is the Atheros Bluetooth manager. It is running. Also the Bluetooth Support Service is running. Unless I am mistaken, that is all that is necessary in terms of Services.
I also updated my Asus BIOS to v1009, thinking I might have a BIOS problem. No joy. The one setting I found there relating to Bluetooth was turned on so that is no problem (unless it doesn't work).
I have since gone back to W10 v1607 to no avail - though v1607 recognised my bluetooth before, it no longer does so. And now Microsoft has automatically upgraded me again to v1703 - but still no bluetooth.
So what am I missing? Anyone else out there have this problem?