Mere pass intel DG31PR ka mother board hai jis mein Lan builtin hai,kuch dino se LAN hardware automatically ghyb hu jata hai...mein ne windows bhi fresh install kar li par problem wohi k lan card automatically ghyb hu jata hai, phr kabhi khud hi a jata hai...jab ghyb huta hai tu device manager mein bhi nahi show huta na network connection mein.phr dosry din khud hi a jata hai. whats this problem.