I had a computer running XP IE6 The only protection on it was Norton 2004. It has xp anti virus 2008 and some others, Trojan downloaders mostly. I removed Norton, I scanned it with Ad aware, Spybot, AVG, and Dr.Web CureIt, fixed some Hijack this items. Malware Bytes Anti Malware would not install, SDFix would install, but I kept receiving stop errors when trying to reboot in safe mode. After all this, the antiviral web sites are still blocked through direct access and updates. The only online scanner I could access was panda scan but IE would not display the information bar to download the activeX controls I ran Process Explorer, there was not any unknown process to end I did ipconfig /flushdns. I tried portable IE7 and Portable firefox on a USB both would not work. I checked the HOST file and it is the same as if it were a new install. The computer is now gone but I wanted to know, what other methods the virus could use to block these specific sites.