Microsoft prevents users from downloading apps from anywhere but the Windows Store, however, and secures those apps inside a sandboxed container. Windows 10 S is simple enough: Users are presented with an OS that appears to be almost identical to Windows 10. The operating system and its small flock of laptops are designed to shoulder Chromebooks out of the market, where Google’s ecosystem currently dominates. Microsoft designed Windows 10 S to accompany students from elementary school all the way through college, ready to graduate to full-fledged Windows PCs. Microsoft’s Surface Laptop Go, which ships with Windows 10 in S Mode installed.