True, the best way would be to have OS support for automatic quarantining of anything from outside until it has been checked. Vista sort of has this but it doe

True, the best way would be to have OS support for automatic quarantining of anything from outside until it has been checked. Vista sort of has this but it doesn't clear the suspicion, so if you download a simple utility (or even a help file) it will warn you every time you open it - unless it comes inside an installer.