i dont know?
From Bitdefender Labs :
Users of soon-to-be-launched Windows 8 are being lured by a rogue Win 8 Security System, adding further headaches after the mess with the vulnerable Flash Player version in IE 10.
Windows 8 is not yet officially launched. But those tasting it via a "Release to Manufacturing" version of Windows 8 or the 90-day trial version of Windows 8 Enterprise are already exposed to several security hazards.
Crooks jumped at the chance for a good lure and advertised a security tool for the soon to be released OS. This software that allegedly solves all security issues on systems using Windows 8 is in fact a sample of the most-spread malicious piece of code to target users online - a fake AV. [See Screenshots]
At the time of writing this text, the hosting domain of this fake AV was still active, which means users remain vulnerable to this scam.
If usually rogue AV pieces sell for small sums of money, Win 8 Security System aims at a bold $99.90 fee that is probably meant to dissimulate responsibility and commitment.
Meanwhile, under the hood, this fake AV installs a rootkit driver with a self-signed certificate (either for x32 or x64 systems) in the Windows driver folder under a random name (consisting of randomly-generated characters) to monitor and manipulate the OS and, if necessary, to repair the Fake AV or hinder any legitimate security suite who might remove the bogus one.
Continued : http://www.hotforsecurity.com/blog/windows-8-users-lured-with-fake-dedicated-security-tool-3488.html