Windows 11 en mode S n’est disponible que dans l’édition Windows 11 Famille, et les utilisateurs souhaitant installer des applications en dehors du Microsoft Store ou effectuer une mise à niveau à partir d’autres éditions doivent sortir définitivement du mode S, qui ne peut pas être inversé.

Uninstall from the Start menu Select Start > All apps and search for the app in the list shown. Press and hold (or right-click) on the app, then select Uninstall. Uninstall in Settings Select Start > Settings > Apps > Installed apps . Find the app you want to remove, select More > Uninstall.

If you suspect that your device may have malware you should have Microsoft Defender run a scan. Here's how to do that on Windows, Mac, or Android.

Contains troubleshooting information for a problem in which the Security Center service can't be started.

Learn how to back up and restore apps, settings, files, photos, and Microsoft Edge favorites and preferences on your Windows PC using Windows Backup.

Windows Security shows you which type of network you're currently connected to. Usually, your device will only be connected to one network at a time. Select a network profile: Domain network, Private network, or Public network. Under Microsoft Defender Firewall, switch the setting to On to enable Windows Firewall.

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 processor‑level protections. These features work together to defend against malware, firmware attacks, and system compromise.

Learn how to install Windows 11, including the recommended option of using the Windows Update page in Settings.

Frequently asked questions (FAQs) about Smart App Control, a Windows feature designed to block malicious, untrusted, or potentially unwanted apps from running on your device.

Windows Security has reputation-based protection that can help protect your PC from potentially unwanted applications. Potentially unwanted app blocking was first introduced in the Windows 10 May 2020 update and is turned off by default for enterprise and consumer customers.