Windows 10 includes Windows Security, which provides the latest antivirus protection. Your device will be actively protected from the moment you start Windows 10. Windows Security continually scans for malware (malicious software), viruses, and security threats. In addition to this real-time protection, updates are downloaded automatically to help keep your device safe and protect it from threats.
Important security info
Windows Security is built-in to Windows 10 and includes an antirvirus program called Microsoft Defender Antivirus. (In previous versions of Windows 10, Windows Security is called Windows Defender Security Center).
If you have another antivirus app installed and turned on, Microsoft Defender Antivirus will turn off automatically. If you uninstall the other app, Microsoft Defender Antivirus will turn back on automatically.
If you’re having problems receiving Windows Security updates, see Fix Windows Update errors and the Windows Update FAQ.
For info on how to uninstall an app, see Repair or remove an app in Windows 10.
To change your user account to an admin account, see Create a local user or administrator account in Windows 10.
Understand and customize Windows Security features
Windows Security is your home to manage the tools that protect your device and your data:
Virus & threat protection. Monitor threats to your device, run scans, and get updates to help detect the latest threats. (Some of these options are unavailable if you’re running Windows 10 in S mode.)
Account protection. Access sign-in options and account settings, including Windows Hello and dynamic lock.
Firewall & network protection. Manage firewall settings and monitor what’s happening with your networks and internet connections.
App & browser control. Update settings for Microsoft Defender SmartScreen to help protect your device against potentially dangerous apps, files, sites, and downloads. You’ll have exploit protection and you can customize protection settings for your devices.
Device security. Review built-in security options to help protect your device from attacks by malicious software.
Device performance & health. View status info about your device’s performance health, and keep your device clean and up to date with the latest version of Windows 10.
Family options. Keep track of your kids’ online activity and the devices in your household.
You can customize how your device is protected with these Windows Security features. To access them, select Start > Settings > Update & Security > Windows Security . Then select the feature you want to explore.