How to start a scan for viruses or malware in Microsoft Defender
If you suspect that your device may have malware you should have Microsoft Defender run a scan. Here's how to do that on …
Getting started with anti-malware in Microsoft Defender
Microsoft Defender can help protect your entire family's Windows, Android, and Mac devices from malicious apps and other malware.
Detect and block potentially unwanted applications
Sep 15, 2026 · Learn how to detect and block potentially unwanted applications (PUA) using Microsoft Defender Antivirus and …
Detect and investigate threats to AI agents using Microsoft Defender ...
Sep 3, 2026 · Learn how to detect, investigate, and hunt for threats to AI agents using Microsoft Defender.
Microsoft Docs
Microsoft Defender for Endpoint on Windows Microsoft Defender for Endpoint on Linux Microsoft Defender for Endpoint on macOS …
Virus and Threat Protection in the Windows Security App
Learn how to use virus and threat protection options in Windows Security to scan your device for threats and view the results.
Troubleshoot problems with detecting and removing malware
Solve problems with detecting and removing malware with Windows Security, including incomplete scans, detection errors, and …
Use the System File Checker tool to repair missing or corrupted …
Describes how to use the System File Checker tool to troubleshoot missing or corrupted system files in Windows.
How Microsoft identifies malware and potentially unwanted applications
Sep 10, 2026 · Learn how Microsoft reviews software for privacy violations and other negative behavior, to determine if it's malware …
Detect and redact Personally Identifiable Information in text
Nov 15, 2025 · This article shows you how to identify, extract, and redact Personally Identifiable Information (PII) from text.
Detect, enable, and disable SMBv1, SMBv2, and SMBv3 in Windows
Mar 11, 2025 · See various ways to detect, enable, and disable the Server Message Block (SMB) protocol (SMBv1, SMBv2, and …