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 Windows, Mac, or Android.
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.
Detect, block, and investigate threats to AI agents using Microsoft ...
Jun 2, 2026 · Learn how to detect, block, and investigate threats to AI agents in real-time using Microsoft Defender.
Troubleshoot problems with detecting and removing malware
Solve problems with detecting and removing malware with Windows Security, including incomplete scans, detection errors, and persistent malware.
Detect and Remediate RC4 Usage in Kerberos | Microsoft Learn
Feb 6, 2026 · Learn how to detect and limit or disable RC4 usage in Kerberos to enhance security in Active Directory domain environments.
Microsoft Defender for Identity overview
Feb 25, 2026 · Learn how Microsoft Defender for Identity helps detect, investigate, and respond to identity-based attacks across on-premises, cloud, and hybrid environments.
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.
Overview of endpoint detection and response
Jun 2, 2026 · Applies to: Microsoft Defender for Endpoint Plans 1 and 2 Microsoft Defender XDR Endpoint detection and response capabilities in Defender for Endpoint provide advanced attack …
What is Microsoft Defender Vulnerability Management
Dec 1, 2025 · Microsoft Defender Vulnerability Management uses a risk-based approach to the discovery, prioritization, and remediation of endpoint vulnerabilities and misconfigurations.
Stay protected with the Windows Security app - Microsoft Support
Summary The Windows Security app is a comprehensive security solution integrated into Windows, designed to protect your device and data from various threats. It includes features such as Microsoft …
Microsoft resources and guidance for removal of malware and viruses
The Windows Defender Offline Beta can detect and remove malicious and potentially unwanted software, including rootkits. For more information, visit the following Microsoft webpage: Windows …