i have a windows 8 pro installed on laptop my problem is i can browse and open facebook on my laapyy in day time but at night time i am not able to browse or even go to login page be it on any browser its always connection reset. i have to acces facebook through mobile but not able to browse with firefox or even internet explorer. i have changed the url for logging to https then also not opens. i have pinged and seen the facebok website their is no loss. i have cleanend and flushed the dns using cmd then also not able to open their is no blocking of this site by firewall. this hapeens only in laptop during night time. in morning after switching on again i am able to login to facebook