Learn about the Windows Security app and some of the most common tools you can use.

Microsoft Defender Antivirus will detect the threat, block the download, and notify you, helping prevent data theft or system damage. It's on by default, reducing the need for an alternative antivirus on …

This feature ensures that your device is actively protected by scanning files and programs as they are accessed or executed. If any suspicious activity is detected, real-time protection will alert you and …

The Device security page in the Windows Security app helps protect your Windows device by managing hardware‑based and operating system security features, including Secure Boot, core isolation, and …

With features like Microsoft Defender Antivirus, Windows Firewall, and Smart App Control, you can easily access and configure robust security settings. Built into Windows, this app ensures your …

Learn how to identify and open encrypted and protected emails no matter what email client you're using.

Depending on what kind of security is needed, someone sending an email from Outlook can encrypt the message, add a digital signature, apply a sensitivity label, or protect the way an email and its …

Microsoft Defender is a new security app that helps protect you and your family across all your devices; Windows, Android, Mac, and iOS.

Microsoft Defender is free anti-malware software included with Windows if you have a Microsoft 365 Personal, Family, or Premium subscription. It's kept updated automatically through Windows Update. …

Files from the Internet and from other potentially unsafe locations can contain viruses, worms, or other kinds of malware that can harm your computer. To help protect your computer, files from these …

Keeping your computer secure helps you avoid malware and direct hacking attempts designed to steal your personal information. Here are some ways you can help reduce your online risk when you use …