Monitor. Investigate. Contain. Remediate.
Sentinel AI is a Windows security suite built to help protect your PC beyond basic antivirus. It continuously monitors security-relevant activity, correlates evidence, investigates suspicious behavior, supports threat containment and quarantine, and verifies remediation outcomes. Microsoft Defender remains the antivirus/antimalware engine and Sentinel AI works alongside it.
Security capabilities
Get Sentinel AI from Microsoft Store
Windows security guides
How Sentinel AI and Microsoft Defender work together
Microsoft Defender Antivirus provides Windows malware and virus scanning. Sentinel AI does not pretend to replace that antivirus engine. Instead, Sentinel AI adds the broader security-suite layer around it: continuous monitoring, investigation, correlation, containment, quarantine, verified remediation, security history, optimization, and evidence-grounded guidance.
The simple distinction: Defender is the antivirus engine. Sentinel AI is the broader Windows security suite working alongside it.
What to review when something looks suspicious
A single unfamiliar process or network connection is not proof of an infection. Start by recording the process name, executable location, publisher information, and the behavior that raised concern. Then compare related activity: recent startup changes, services, scheduled tasks, and network connections. Context matters more than one alarming label.
Sentinel AI is designed to bring related security evidence together for investigation. You can also use our step-by-step guides to check suspicious processes and review network connections without treating every unknown item as malicious.
Containment and verification
When a threat is credible, containment should be deliberate and reversible where possible. Review what is being isolated or blocked, preserve the information needed to understand the incident, and confirm the action actually took effect. Quarantine and restoration are different actions from antivirus detection.
Sentinel AI is intended to support that evidence-led workflow while Microsoft Defender continues to provide built-in antivirus and antimalware scanning. No security tool guarantees prevention or detection of every threat.
Explore practical guides
Get actionable tips on checking Windows security, investigating unfamiliar processes, finding things to do tonight, and choosing date night ideas. Browse the complete resources library.