Windows Defender is the No. 1 antivirus on Windows 10, protecting more computers against viruses, malware, spyware, and other threats than any other solution.

 

Keep your PC safer with the free, trusted antivirus protection built-in to Windows 10.

Windows Defender is built-in to Windows 10. There’s nothing to buy and nothing to install. No configuration, no subscriptions, and no nagware.

Just ask Cortana or type “Windows Defender” in the task bar search box. If you see a “PC status: Protected” message, you’re good to go.

If Windows Defender is turned off, uninstall other antivirus solutions and check again. Windows 10 will enable Windows Defender automatically.

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