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Free Windows antivirus and PC optimizer: 360 Total Security
Updated
Qihoo 360 is the security company behind 360 Total Security, a free antivirus and PC optimization suite for Windows. It uses multiple antivirus engines for malware detection, adds privacy and cleanup tools, and is offered in a free Essential tier, a Premium membership and a Business edition with centralized management.
360 Total Security is used by individual Windows users and small organizations that want free antivirus with cleanup and optimization tools. The Business edition adds centralized multi-device management for teams. Organizations with strict vendor or regional requirements should review the company before adopting it.
The Essential tier is free and includes virus detection, anti-ransomware, internet protection, cleanup and a sandbox. Premium Membership starts at $26.99 per year and adds cleanup pro, driver updater, privacy anti-tracker and professional support with a 30-day money-back guarantee. Business pricing is custom.
Common alternatives to Qihoo 360 include Avast Free Antivirus, Bitdefender Antivirus Free and Microsoft Defender. Microsoft Defender is built into Windows, while Avast and Bitdefender offer free tiers with paid upgrades. Compare detection results, privacy terms and performance impact.
Pricing Model
FREEMIUM
Starting Price
Contact vendor
Free Options
Free version
| Feature | Essential | Premium Popular | Business |
|---|---|---|---|
| Virus detection and anti-ransomware | , | , | |
| Internet protection and cleanup | , | , | |
| Sandbox | , | , | |
| Cleanup pro and driver updater | , | , | |
| Privacy anti-tracker | , | , | |
| Professional support | , | , | |
| 30-day money-back guarantee | , | , | |
| Centralized multi-device management | , | , |
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Compliance Standards
SOC 2 Type II
EnterpriseISO 27001
EnterpriseGDPR Compliant
GlobalHIPAA
HealthcarePCI DSS
FinanceCCPA
PrivacyFedRAMP
GovernmentCSA STAR
CloudDeployment & Data
Unified endpoint security, XDR and risk management platform
AI-powered endpoint, cloud, and identity security.
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