friends .i have been using bsnl broadband now since last two months i have been using i ball baton 150 router.i am using laptop on wifi and to my is directly connected.suddenly one day i found my desktop lost its internet connection.on devicemanger i found yellow question mark on ethernet controller.and now a days i am getting pop up message new hard ware found .ethernet controller.i re formated my windows and installed alll the softwares from my motherboard cd..still same message is hardware found i am unable to connect to internet thru my desk top.Looking for solution for it.will any one suggest wht should be the remedy?