Overview
This lecture explains the features and operation of Microsoft Defender Antivirus within Windows, focusing on enabling, disabling, and updating virus and threat protection settings.
Microsoft Defender Antivirus Overview
- Microsoft Defender Antivirus is integrated into Windows and enabled by default to protect against viruses and malware.
- It is accessed through the Windows Security app, under the "Virus & threat protection" section.
- The app may be called Defender Antivirus, Windows Defender, or Microsoft Defender Antivirus depending on Windows version.
Accessing Windows Security App
- Use the Windows search function to find the Windows Security app by typing "security."
- The app provides features like account protection, firewall, network protection, app/browser control, and virus/threat protection.
Managing Virus and Threat Protection
- Virus & threat protection is the main section for antivirus settings.
- Real-time protection scans files as they are transferred in and out of the system to detect malware.
- It is recommended to leave real-time protection enabled unless troubleshooting requires it to be turned off.
Adjusting Antivirus Settings
- Go to "Manage settings" under virus and threat protection to enable/disable real-time protection.
- Additional options include cloud-delivered protection, automatic sample submission, tamper protection, controlled folder access, and exclusions.
- Disabling real-time protection prompts a warning that the device is now vulnerable.
Updating Virus Definitions
- Antivirus applications use signature definitions to identify malware; keeping them up-to-date is critical.
- Definition updates are usually automatic, but can be checked manually in the threat and protection updates section.
- The "Check for updates" option ensures you have the latest protection by downloading and installing new definitions.
Key Terms & Definitions
- Real-time protection — Monitors and scans file activity in real time to detect malware.
- Virus signature/definition — Database used by antivirus software to identify known malware.
- Windows Security app — Central interface for managing security features on Windows.
Action Items / Next Steps
- Practice navigating to the Windows Security app and adjusting real-time protection.
- Manually check for antivirus definition updates on your device.
- Review settings for cloud-protection, sample submission, and folder access as needed.