WindowsDefender is built into Windows 10 system, which is a comprehensive anti-virus tool integrating firewall, family safety, performance and health, and has strong anti-virus ability. There is no need to install third-party security software, including 360 security guards and WindowsDefender, to provide basic protection. For some advanced threats, it may not be effective enough, and third-party security software such as 360 security guards will provide additional protection.