Meet Microsoft Defender

Microsoft Defender is the simple way to protect your digital life and all of your devices - Windows, Mac, iOS, or Android - so you and your family can have more peace of mind. Now available for Microsoft 365 Family or Personal subscribers.

Get started

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Explore security

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Stay secure with Windows

Windows makes it easier to stay secure with built-in protection using Microsoft Defender Antivirus.

Check out Windows Security

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Be safer over Wi-Fi

Most devices connect over Wi-Fi these days and that creates opportunities for attackers.

Learn to protect yourself

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Protect yourself from scams and attacks

Criminals are constantly trying to steal or trick you into revealing your personal information.

Learn to spot them

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Keep your PC up to date

Windows Update automatically installs the latest updates and security improvements.

Stay up to date

Trending topics

At home

Work from home more securely

Three easy steps to improve your cybersecurity at home

Ransomware detection and recovering your files

Online

Protecting yourself from identity theft online

Protect my PC from viruses

Let Microsoft Edge create and remember strong passwords for you

Secure your accounts

Securing your devices and accounts

Protect your online accounts

How to use the free Microsoft Authenticator app

Windows

Device protection in Windows Security

Turn on device encryption

What is TPM?

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Add an extra layer of security with Personal Vault

Protect your most important files, like your passport, driver’s license, or insurance information with OneDrive Personal Vault.

Meet Personal Vault