Earbuds ep-t21,i can't use them with the pc

I have problems connecting the headphones to my pc.
The pairing is done correctly but I do not listen to music nor can I conduct telematic meetings using the microphone. I have a windows 8.1. Can you help me?
Thanks

Hi @ANNA

Sorry to hear you’re having this issue. Our Customer Service team are on it - they’ll get back to you with some troubleshooting ideas.

Please also refer to this thread, for help.

@Kelly_AUKEY

Thanks but with windows 8.1 the configuration is different.

Have you tried updating the drivers for the PC itself?
Someone else on here had the same problem and solved it that way.
Worth a shot anyway.

Yes, several times. Bluethooth USB module
Thanks