Hello,
I do have the same issue from about 3 days (Dell XPS 9560, Win 10):
2 Logitech devices: 1 Mouse M535, 1 Keyboard K380
1 Bose QC 35 headphones
These appeared as Paired under Bluetooth but...not working at all.
I've tried:
- turn on/off Bluetooth, remove/add devices again - same result
- remove the devices from Device Manager - same result
- do a clean boot as per https://support.microsoft.com/en-us/help/929135/how-to-perform-a-clean-boot-in-windows same result
What makes me crazy:
- remove devices from Bluetooth (Bluetooth=On)
- try to add the devices again and pair - the Mouse stays stuck in Pairing mode - LED blinking fast, etc
- turn Off, turn On Bluetooth - the devices are added Automatically back including Logitech Bluetooth SDP Server - ?!
- the devices re-appears as Paired but are not working of course
Important:
- Services - Bluetooth Support Service is set to Manual
- Device Manager - Bluetooth - I have no entry for Bluetooth Radio (?!) neither Service Discovery
What next?