bt400

Hi, as in the title, I'm trying to pair my Sony WH-1000XM3 headphones with my PC (running Windows 7) using the Asus BT400 dongle. I've installed the BT400 drivers (from CD) and I have BT available but when I try to add a new device... it doesn't detect my headphones at all (yes, they are in...

I'm not sure how to even start getting to the bottom of this issue... any ideas or suggestions welcomed! The headphones (Sony WH-1000XM3) work perfectly with my iPhone. No distortion, even if I go in another room! However, when I connect them to my PC, using the ASUS BT400 dongle, there is...