what is s mode

S Mode is a restricted mode in Windows 10 and Windows 11 that prioritizes security and performance by only allowing the installation of apps from the Microsoft Store and restricting access to the command line. It is designed to provide a more secure computing environment, but it comes with limitations, such as the inability to install apps from outside the Microsoft Store. Switching out of S Mode is a one-way process, and once you switch out, you cannot go back to S Mode. This feature is particularly useful for users who prioritize security and simplicity over the ability to install apps from third-party sources.