Option Four: To Turn On Windows Features in Command Prompt.Option Three: To Turn Off Windows Features in PowerShell.Option Two: To Turn On Windows Features in PowerShell.Option One: To Turn On or Off Windows Features from Windows Features.If Windows Features is empty or blank, then double check to make sure that the Windows Modules Installer service is enabled and set to Automatic. You must be signed in as an administrator to be able to turn Windows features on or off. This tutorial will show you how to turn Windows features on or off for all users in Windows 10. After you turn off a feature, you can turn it back on at any time. Turning off a feature doesn't uninstall it from your PC or reduce the amount of hard drive space used by it. Certain other features are turned on by default, but you can turn them off if you dont use them. Some programs and features included with Windows, such as Internet Information Services, must be turned on before you can use them. How to Turn Windows Features On or Off in Windows 10 How to: Turn Windows Features On or Off in Windows 10