Dell vostro 5470, n7260 wifi card, upgraded to win10 from win8.1. Bluetooth used to work fine my bluetooth headphones keep disconnecting for no obvious reason. That is, sometimes after ever changing time of idling (it can be seconds to hours), sometimes exactly when I start to play music, sometimes after 15 or so seconds after music play start.
I have tried turning off the "allow to turn off this device to conserve power" in device manager for these three: bluetooth, wifi (just to be sure, because they are on the same chip) and the device itself under Human Interface Devices.
All the bluetooth services in services.msc are up and running.
Have tried multiple drivers. Win10 automatically gave me the latest, but I downgraded to 2014 driver from Dell's page for my laptop, I think I had this driver on win8.1, when it was working fine.
And I have tried running the laptop in "high power setting" mode.