On September 15th, Microsoft officially launched the simplified Chinese version of Windows XP Service Pack 2, marking the security of Microsoft's operating system into a new phase of "active protection." According to Mr. Zhu Xiaowen, Director of Security Markets at Microsoft's Marketing Strategy Department, Windows XP SP2 adds firewall technology to the underlying operating system, so that the firewall is activated by default and the user IP address is invisible. The user's IP address is exposed before the firewall is activated. For more than 80% of software defects due to buffer overflow, Windows XP SP2 adds the ability to automatically shut down abnormal processes, effectively avoiding attacks against buffer overflows. The security features of the operating system are usually scattered among the various system modules, but Windows XP SP2 has a security center for centralized management, which improves usability and ease of use. In short, Windows XP SP2 is like a "security shield" that provides Windows security settings, static firewall preloading, pop-up window control, email/time message protection and many other enhanced security features through the Windows Security Center interface. To ensure that users can make more secure decisions. Specifically, Windows XP SP2 security new features include: Enhanced network security protection: Windows static firewall pre-loads during system startup and before Windows Firewall or third-party firewalls are launched, so that no attackers can take any advantage. . Internet Explore Pop-up Window Control: With Windows XP SP2, users can safely browse the web and choose whether to open pop-ups according to their needs. This is because the increasing number of pop-up windows has become a hacker's attack channel. Email/Timely Message Protection: Windows XP SP2 filters attachments from the operating system level to provide timely protection for email/instant messaging. Memory Execution Protection: No Execution (NX) technology is a data execution prevention technology provided by Microsoft and Intel, AMD and other hardware vendors to improve the "memory buffer overflow" problem from the software setting layer and hardware system layer. Windows XP SP2 is also the result of Microsoft's cooperation with partners. Among them, Windows Security Center is the result of Microsoft's close cooperation with firewalls and anti-virus vendors. Windows Security Center provides users with a secure guide through a window to help users quickly see if these important security features are turned on and the latest updates have been installed to determine if additional measures are needed to protect the security of the computer. Users can use a friendly interface. Directly understand the state of the firewall, automatic update services, and third-party antivirus applications; data execution prevention is the result of close collaboration between Microsoft and processor manufacturers. Both Intel and AMD offer support for Windows XP SP2's data execution protection technology in their new processors to effectively prevent "buffer overflows." Microsoft will also work closely with computer manufacturers to launch computer systems pre-installed with Windows XP SP2. Windows XP SP2 has gone through the biggest test process in Microsoft history. It is no longer a simple service pack and anti-virus software, but a new version of the security operating system.