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One free scan finds every outdated or missing driver and matches the right update for your exact hardware.Free scan · exact hardware matchAntivirus focuses on preventing or detecting threats on a device; endpoint detection and response (EDR) adds visibility and tools to investigate suspicious activity and contain or remediate an incident. They are not necessarily separate products: modern endpoint-security suites often combine both, so compare the capabilities included in each product and plan rather than relying on the label.
What antivirus does
Antivirus is a protection layer intended to prevent or detect malicious files and activity on an endpoint, such as a computer. Traditional antivirus is often associated with identifying known threats by their signatures, but that is not a complete description of modern antivirus. Microsoft describes its next-generation antivirus protection as using behavior-based, cloud-delivered, machine-learning-powered techniques. Its documentation lists antivirus and EDR as distinct but related capabilities in Microsoft Defender for Endpoint (Microsoft Defender for Endpoint on Windows).
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Next-generation antivirus (NGAV) may also use behavioral detection, machine learning, AI and exploit mitigation to try to prevent known and unknown threats. These techniques overlap with some of the signals EDR uses, but prevention remains the central emphasis.
What EDR adds
EDR stands for endpoint detection and response. It centers on monitoring endpoint activity over time, detecting suspicious behavior, helping security staff investigate alerts, and enabling actions to contain or remediate a threat. Rather than asking only whether a file is malicious, EDR helps answer what happened on a device, what else may be involved and what response is available.
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Telemetry and detection
Microsoft describes its Defender for Endpoint EDR as providing near-real-time, actionable detection and behavioral cyber telemetry. Examples in its documentation include process information, network activity, login activity, registry changes and file-system changes. The service groups related alerts into incidents to support investigation. Microsoft says the telemetry is stored for six months; that is a vendor-documented detail for this service, not a general EDR retention period. Its sensor also throttles repeated identical events, and Microsoft says the service is not intended to be a complete auditing or logging solution (Microsoft’s overview of endpoint detection and response capabilities).
Investigation and response
Depending on the product and plan, EDR tools can support alert triage, incident investigation, threat hunting, and actions to stop or contain malicious activity. The breadth of response authority varies. Microsoft lists these manual actions for Defender for Endpoint Plan 1 and Microsoft Defender for Business: run an antivirus scan, isolate a device, stop and quarantine a file, and add a file indicator to block or allow. Those listed actions should not be assumed to apply to every Microsoft plan or every EDR product; check the current licensing and feature matrix before buying.
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How the two capabilities fit together
Antivirus and EDR are best understood as different emphases, not mutually exclusive types of software. Antivirus protection aims to stop or detect threats; EDR provides more behavioral visibility and supports investigation and response when suspicious activity needs attention. CrowdStrike describes next-generation antivirus as the prevention component and EDR as detection, investigation and response when a threat gets past prevention (CrowdStrike’s EDR vs. NGAV explanation).
A product may bundle antivirus protection with EDR, while a vendor may sell multiple tiers with different response tools. A product called antivirus may include advanced detection methods, and an EDR product may rely on prevention capabilities elsewhere in the suite. Compare what a particular offering actually does, rather than assuming its name tells the whole story.
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What to compare when evaluating endpoint products
Use the same questions for each vendor and plan. The following are evaluation criteria, not independent test results or a ranking of products.
- Prevention: What malicious files and activity does the product aim to block, and what techniques does it use?
- Behavioral detection and telemetry: What endpoint events are collected, how are suspicious behaviors detected, and what visibility is available to investigators?
- Alert triage and investigation: Can staff connect alerts into incidents, examine relevant activity and determine the likely scope of an event?
- Threat hunting: Does the offering let security staff search for suspicious activity proactively, and is that capability included in the plan?
- Containment and remediation: Which actions can staff take—such as isolating a device or stopping and quarantining a file—and which are manual, automated or plan-limited?
- Integrations: How does the product work with existing endpoint, identity and security tools? Check API availability and adjacent-tool integrations as well as the advertised integrations.
- Operating systems and offline coverage: Confirm that the endpoints you use are supported, and ask how protection behaves when devices are offline.
- Operations: Consider the management workload, the people needed to review detections and respond, and whether the product’s cloud architecture fits your requirements.
- Plan boundaries: Verify exactly which capabilities, response actions and support options are included in the specific license you would purchase. Features and packages can change.
For example, Microsoft Defender for Endpoint and CrowdStrike Falcon are commercial products whose vendor documentation can illustrate how vendors describe these capabilities. Such descriptions do not establish which product detects threats more effectively. The cited sources are vendor-owned explanations, not independent comparative product tests.
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What EDR does not guarantee
EDR does not mean a product records every event or that every alert will be correctly interpreted and acted on. Telemetry scope, retention, detection quality and response authority depend on the implementation and plan; Microsoft’s notes about event throttling and the limits of its service’s logging purpose illustrate why buyers should inspect those details.
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Frequently Asked Questions
Do I need EDR if I already have antivirus?
Possibly, depending on your need to investigate suspicious activity and take response actions. First check whether your current endpoint product or plan already includes EDR capabilities, then compare its telemetry, investigation tools and containment actions against your team’s needs.
Quick Recap
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