Windows Firewall (officially called Windows Defender Firewall in Windows 10), is a firewall component of Microsoft Windows. It was first included in Windows XP and Windows Server 2003. Prior to the release of Windows XP Service Pack 2 in 2004, it was known as Internet Connection Firewall. With the release of Windows 10 version 1709 in September 2017, it was renamed Windows Defender Firewall.
