From yesterday 2/13/2007, when I use IE to open some website, it automatically open some advertisement website. I tried microsoft's virus defendent, but it didn't work. My Macfee shows virus alert and it is GENERIC TROJAN located in C:\WINDOWS\system32\drivers\etc\hosts. How to remove this virus? Is it Ghost Trojan? I'm totally layman of this, anyone can help to answer? THANK YOU SO MUCH!!!!