Windows Defender Security Center provides real-time protection for your personally owned PC that guards against viruses, spy-ware and other malicious software. Learn more about Windows Defender ...

Here’s what she described: "I received a pop-up that froze my computer and read, ‘Access to this system is blocked for security reasons’ from Windows Defender Security Center. It came with ...

Disabling the Windows Security Center service will not disable Windows Defender AV or disable Windows Defender Firewall. However, Windows Defender AV will be disabled automatically when a third ...