Windows 10 in S Mode only allows installing apps from the Microsoft Store. Windows 10's Built-In Mail App: Everything You Need to Know. Windows 10 in S mode is designed for security and performance, exclusively running apps from the Microsoft Store. It brings some big changes from Windows 10 … Windows 10 already comes with a built-in Antivirus utility called Windows Defender Security Center. Windows 10 in S mode is a version of Windows 10 that's streamlined for security and performance, while providing a familiar Windows experience. Windows 10 S, the newest version of Windows, will power so-called Always Connected PCs expected this spring. Windows 10 S is designed for PCs, though it can still switch into tablet mode if desired. Windows 10 S is a new edition of Windows 10 that looks, and for the most part feels exactly like any other edition of Windows 10. Windows 10 operating devices tend to get slow after some time so Microsoft came up with an option for those wanting a speedy, streamlined experience — Windows 10 in S Mode. About Windows 10 in S mode. Microsoft announced Windows 10 S back in the May, but there’s still a lot of confusion as to what it is and how it’s different from the standard Windows 10 release. Windows 10 S Mode competes with Google’s Chrome OS, so Microsoft has, as expected, also positioned it as a more secure PC operating system. This edition, however, has one major plot twist. This 2-in-1 PC is powered by the Snapdragon 850, making it a Windows 10 on ARM device that also comes bundled with Windows 10 S mode. For more info, see the Windows 10 in S … If you want to install an app that isn't available in the Microsoft Store, you'll need to switch out of S mode. If you make the switch, you won't be able to go back to Windows 10 in S … Windows 10 in S mode is a version of Windows 10 that Microsoft configured to run on lighter devices, provide better security, and enable easier management. If you want to install desktop apps from the Internet or CD/DVDs, then you will need to switch out of it. Switching out of S mode is one-way. In layman’s terms, Windows 10 S is a new edition of the Windows 10 OS that will sit alongside other editions — Windows 10 Home and Windows 10 … To increase security, it allows only apps from the Microsoft Store, and requires Microsoft Edge for safe browsing.