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

Protect the whole family with Microsoft Defender

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

What is typosquatting?

Secure your accounts

Change your Windows password

Securing your devices and accounts

How to use the free Microsoft Authenticator app

Windows

Device protection in Windows Security

Turn on device encryption

Backup your BitLocker recovery keys

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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