Think of S mode as "Windows with training wheels." It is a version of Windows 11 (or 10) streamlined for security and speed. In S mode:
Once you disable S mode, you cannot turn it back on through a simple setting. To get it back, you would usually have to perform a full factory reset using a specific recovery image from the manufacturer. Because of this, you should only switch if you’re sure you need an app that isn't in the Store. The Verdict: Should You Do It? is switching out of s mode bad