Windows 10: Problems using mic with my Bluetooth headphones

I am using Sony WCH-CH510 Bluetooth wireless headphones with my Windows 10 Dell Latitude 7420 laptop. I am seeing a very weird behavior in the PC whenever I try using the microphone of the headphone. The applications do not release the microphone resource after using it. For example if I open Sound settings and go to recording tab I do see my microphone listed there as default but then I try to open another tab I see that the sound settings do not close and the whole UI hangs. Then I get a message that rundll32 is not responding and then I can not hear sound in my headphone as well. And during

:)

 

bluetooth headphones

setting up win10 Bluetooth and my Bluetooth headphones work fine ,but every time I reconnect the headphones I have to delete them from Bluetooth settings and let win10 pickup the headphones again ,before they will pair ,then win10 want to reboot to add the headphones ,I reboot and they work fine ,but next time I plug the headphone in again they will not pair ,don't even get an option to pair till I delete the head phones from the list ,, any suggestions ,, thank

 

Headphone mic not working with laptop 3.5mm port

I have sennheiser hd4.40 wireless headphone. I also got a cable with headphone having 2.5mm pin(attached to headphone) to 3.5mm pin(attached to mobile phone).

Problem is that when i connect 3.5mm pin to my mobile phone headphone jack, in call i am able to use mic and headphone both at same time but:

1. When i connect the 3.5mm pin to 3.5mm jack for mic on my laptop, i am not able to use the mic.(my laptop has separate 3.5mm mic and 3.5mm headphone jack)
   
2. When i connect to 3.5mm jack for headphone, only headphone is working with laptop not mic.
   

Please do not suggest why I am not using Bluetooth because it is a separate problem.

I am missing something or maybe this may be limitation or something else. Help me on this. :-(

 

Bluetooth not recognising headphones

Bluetooth on my PC recognises, pairs with and works with an ear piece headphone/mic.
Bluetooth on my Smartphone recognises, pairs with and works with an Ausdom headphone.
Therefore all hardware works.

However, PC Bluetooth will not recognise, let alone pair with, Ausdom headphone.

I have tried re-boots, turning Bluetooth on/off, uninstalling, re-loading drivers, etc. I have run out of ideas.

Any suggestions please?