

Several months later, the Sasser worm did something similar. In mid-2003, the Blaster worm attacked a large number of Windows machines, taking advantage of flaws in the RPC Windows service. It was disabled by default due to concerns with backward compatibility, and the configuration screens were buried away in network configuration screens that many users never looked at.

When Windows XP was originally shipped in October 2001, it included a limited firewall called "Internet Connection Firewall".

Before the release of Windows XP Service Pack 2, it was known as the " Internet Connection Firewall." It was first included in Windows XP SP2 and Windows Server 2003 SP1. Windows Firewall (officially called Microsoft Defender Firewall in Windows 10 version 2004 and later) is a firewall component of Microsoft Windows.
