How to activate Windows Defender in Windows 8

Like every new Windows release, Windows 8 is more secure than the operating systems that came before it. That’s due in large part to three major enhancements: An increased emphasis on UEFI Secure Boot optimizations, the extension of the SmartScreen Filter across the operating system, and the default inclusion of a more robust version of Windows Defender, which now protects against all kinds of malware–not just spyware.