My Bluetooth occasionally disconnects at the moment I start a video on YouTube. I have to turn the headphones off and back on again to reconnect. It happens with different headphones so it's not device specific. I've tried reinstalling the Bluetooth driver. No change.
Another odd symptom is that when using iTunes, if I connect a Bluetooth device, I have to shutdown iTunes and restart it for the connection to register. That only seems to happen with iTunes.
I'm using Windows 8.1 on a Dell XPS 8700, Bluetooth driver 18.104.22.168.