Hope you will excuse me for being late to report results, it was due to another unplanned business travel. Back to the subject I used the first driver mentioned from this link https://www.atheros.cz/atheros-wirel...et=37&system=8, and so far no BOSD appeared. Again I appreciate your help very much Addictive Gamer, and will mark this as solved, Tanks to your professional advise.