In my laptop virus alert wallpaper is displaying and System security 2009 automatically installed. System security 2009 showing that my laptop is infected with virus it ask me to scan after scan it showing many viruses. when i try to clean all virus it ask me to activate the system security 2009. I am using Mcafee virus scan it has catched some Fake Trojan virus . Now macfee also infected onaccess scan has been disabled automatically.