: Download the standard installer directly from the 360 Total Security website . This version includes the core antivirus engine (integrating Avira and Bitdefender engines) and system optimization tools without any cost.

Qihoo 360 occasionally runs official promotional events, beta testing programs, or seasonal discounts. Downloading the software directly from the official website ensures you receive a clean installation file and access to legitimate trial periods for the Premium tier. How to Install 360 Total Security Safely

Note: The installation process is straightforward, allowing you to choose between the free version or opting for professional features during setup. Alternatives to Finding a Free License Key

: Download the latest version and sign in to your 360 account within the app.