Another leak comes from Windows 8: SmartScreen, a feature that is currently in Internet Explorer & Windows Live Messenger, is being included in the operating system itself. This should definitely pump up the security as it blocks malicious software from running. Software that is unknown or is black listed by Microsoft would be blocked from running on the system.
In Windows 8, SmartScreen appears to serve two purposes – to reactively check the file system and proactively prevent any downloaded applications from running that are unknown to the filter. Unfortunately I haven’t been able to trigger it so I don’t know exactly how it responds but I presume not unlike a security warning. Having said that, it’s comforting to know the feature can also be disabled for the brave.