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Microsoft Defender Antivirus

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description Microsoft Defender Antivirus Overview

Microsoft Defender Antivirus is a built-in Windows security application that utilizes cloud-based detection and behavioral analysis to identify and block malware, ransomware, and other threats in real-time without requiring separate software subscriptions.

help Microsoft Defender Antivirus FAQ

Which platforms include Microsoft Defender Antivirus?

Microsoft Defender Antivirus is built into current Windows installations, including Windows 10 and Windows 11. It is integrated into the Windows Security app rather than requiring a separate antivirus download.

How does Microsoft Defender detect malware?

It combines signatures, cloud-delivered threat intelligence, heuristic checks, and behavioral analysis. Real-time protection can examine files and processes as they are opened or executed.

Does Microsoft Defender protect against ransomware?

It is designed to detect and block malware, including ransomware, using real-time and behavior-based protection. Windows also provides related controls such as Controlled Folder Access for limiting unauthorized changes to protected files.

Do I need to buy a separate antivirus subscription to use Microsoft Defender?

Windows users can use the built-in Microsoft Defender Antivirus without purchasing a separate consumer antivirus subscription. Additional Microsoft security products may offer enterprise or identity features, but they are not required for the core Windows antivirus.

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