I have a strange problem. Currently i'm running Windows 7 32bit. I surf internet on my home computer. Everything was going fine but today when i started my computer and tried to browse few sites all the sites did not load. google.com gmail.com tomshardware.com etc. loaded but facebook.com hotmail.com softepedia.com did not load. I have performed a full system scan with Norton Internet Security 2011 and MalwareBytes it detected one virus and i removed it. But still the problem persists what might be the reason?