Yahoo Mail Norton Doesn't Detect Virus Executable - Everyone beware about files scanned in yahoo mails. It doesn't detect executable viruses. This file was sent by my friend and didn't notice she sent a wrong file which is infected file and after I downloaded it got scanned by my anti-virus. Why didn't norton detect this? 'No virus threat detected File' Its really obvious but why didn't it? Does yahoo really have norton installed? or does their norton work? Anyone having similar cases like this?