Orome1 writes: Windows 8 launched this week. It brings a new interface, but under the hood, it introduces a number of new security features. The most significant change in terms of security is the use of the Unified Extensible Firmware Interface (UEFI) replacing the old BIOS. With UEFI, a computer will only run operating system kernels that have been digitally signed by an approved software vendor. Thus, the user is guaranteed that the operating system has not been tampered with by attackers. Windows Defender, Microsoft’s Anti-Malware solution is now more comprehensive and is included by default in Windows 8, which is particularly attractive for consumers who will receive Anti-Malware protection out of the box.