the sound becomes discontinuous after a period of connection with BT headset

Broken up sound coming from the headset

info. might be required:-

-My laptop is Dell inspiron N5110, Windows 7, 64 bit.

-My Bluetooth device: Dell Wireless 1702 Bluetooth v3.0+HS

the problem is:-

I bought I new LG Bluetooth headset. When I pair it with any computer is works properly, but when I pair it with my Dell laptop it works fine for about one minute then the sound becomes discontinuous and slow. although the headset isn't far from the laptop (the distance is lower than 1m) and its buttery is full. I tried to reconnect many times but still not working properly. When I try to update my Bluetooth driver through downloading it from Dell.com then installing it normally every thing went okay but nothing changed. I have pair it with another PC which has the same model and every think is similar and it works very well.

please how to fix this sound issue.