Hi, I explain how I've half fixed it.
1.- Go sound control panel and right click into properties of all sound devices you have in your computer then advanced properties then un-check "Allow aplications the exclusive control of this device"
2.- Be sure all the sound devices both in playback and record layers which you don't normally use are in "disabled"
3.- Once all devices got "unexclusived" and not used are in "disabled", go record devices layer and disable the headset mic too.
Then you will have active and working headset and headset mic both in playback layer at sound control panel.
It's been almost 6 months blaming SONY and my bluetooth dongle but finally I can play games normally, use skype and Voice Attack perfectly.
Note I said half fixed because in my case I must re-setup after playing Rocksmith due to the needed activation of the disabled guitar cable input.
Good luck.