While others exclaim over the cool tiles in the Metro interface or wonder how fast boot time will be or how well the touch features will work, when IT security pros think of Windows 8, the first question is naturally, “What’s been done to improve security?” Based on what we know so far, most of the security tweaks aren’t dramatic – instead, they extend the security functionalities in Windows 7. One brand new security mechanism is “secured boot,” which is designed to prevent malware from disabling anti-virus software before it loads. The catch? It only works on computers that support this feature in the BIOS. You can read more about Windows 8 security here:
http://www.infoworld.com/d/security/windows-8-get-important-security-tweaks-173360
On the consumer side, the big news is that Windows 8 is expected to include Security Essentials, Microsoft’s currently freely downloadable antivirus product, which will become part of Windows Defender.
http://betanews.com/2011/09/16/will-windows-8-make-security-software-obsolete/