hi   

i have dell inspiron 15r p28f laptop, recently am getting one problem  wifi is devices is not showing and sometimes its showing automatically  15-20 min  wifi is not comming then wifi is enabled but no wifi routers are detecting.

disable and enable it will work again 15 -20 min same problem internet is not comming, then open the wifi connection it will show only what i connected but internet is not comming. once i try to disconnect it. the wifi connection was not working 

please tell the solution