360 Security Guard is the most popular free security software in China. It features several powerful functions, such as detecting and removing the latest Trojan viruses, cleaning up malicious comments and system plug-ins, managing application software, Kaspersky antivirus, real-time system protection, and fixing system vulnerabilities. In addition, it also provides specific auxiliary functions including comprehensive system diagnosis, popup plugin immunity, cleaning usage traces, and system restore. Moreover, it offers a comprehensive diagnostic report for the system, enabling users to promptly identify issues and truly providing all-round system security protection for every user.