all i can suggest is recheck your setting at control panel.
if anything just look normal to you, bring it to shop.
its maybe some problem regarding your hardware itself.
i have friend that have the same problem as your and she'd have problem with her wireless card, not the setting.

and my friend, please change your avatar.
i natural on political aspect but your action sometimes reflect the way you thinking.
dont make dosa kering especially during ramadhan.
nothing personal and no offend.
peace

so how your problem?
solve yet abou the wifi thing?