1. Right click the Window icon to open Settings.
  2. From the available selections, choose Apps.
  3. Under Installing Apps, select Allow apps from the Store only.
  4. To allow a blacklisted app, just repeat the steps and select Allow apps from anywhere, under the Installing apps section. Windows allows you to run already-installed apps, even if you later decide you want to only run those selected from the app store.

Windows 10 Security and Networking

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Use the Windows 10 Parental ControlsFind Your MAC AddressTurn Your Windows PC into a Wi-Fi HotspotPassword Protect a FolderCreate a Guest Account in Windows 10Enable Windows Hello Fingerprint LoginSet Up Windows Hello Facial RecognitionHow to Restrict Cortana’s Ever-Present Listening in Windows 10Automatically Lock Your PC with Dynamic LockBlacklist Non-Windows Store AppsFind Saved Wi-Fi PasswordsSet Up a Metered Internet ConnectionUse Find My DeviceStream XBox One GamesAll Windows 10 TipsMap a Network DriveCreate Limited User AccountsSet Time Limits for KidsPin People to Your Taskbar