Overblown, alarmist. Lots of security software already does stuff like this, it helps protect users from installing all sorts of garbage or spoofed software.[citation][nom]jhansonxi[/nom]Works perfectly as long as malwre doesn't modify SmartScreen to send back forged hashes.[/citation]SmartScreen occurs BEFORE you install something. If it can tamper with SmartScreen, that means it is already running - in other words your computer is already compromised. At that point you're already vulnerable, why bother attacking smartscreen, when you can just open the machine wide and install whatever you want remotely? Silly.