Windows S Mode is a restricted version of Windows designed for entry-level devices, allowing only apps from the Microsoft Store to enhance security and performance. Users may find it limiting if they need software not available in the Store, such as gaming platforms or professional tools. Exiting S Mode is done through the Microsoft Store by searching for "Switch out of S Mode," clicking "Get" or "Install," confirming the switch, and waiting for the process to complete. This change is permanent, and users cannot revert back without a full reset or reinstallation of Windows. Important considerations before switching include ensuring a stable internet connection, checking the Windows edition, backing up data, and understanding the security risks involved. Common issues during the process include the missing option to switch and installation failures, which can often be resolved by restarting the PC or checking the internet connection. After leaving S Mode, users can install applications from outside the Microsoft Store but must be cautious about security.