This problem is only happening on 1 PC on our domain. All other PC's can access this website just fine. This particular machine cannot access www.site.com (fictitious). We clear the dns cache, checked network connections and cleared internet history & cookies. After we flush the dns, the website comes up perfectly and you are able to browse within the site. However, the next day or so, the same PC cannot access the website. I don't know what is wrong with this thing. We clear the dns cache again and it works. Only 2 days later: SAME THING. Please help.