https://www.bleepingcomputer.com/news/microsoft/all-the-latest-features-of-the-windows-10-may-2019-update/ > As with any major feature update, Microsoft brings new applications and features to Windows 10. The Windows 10 May 2019 Update is no different with new features such as the Windows Sandbox to test untrusted apps, a new Light Theme experience, and a decoupled Windows Search and Cortana. > Windows 10 version 1903 also introduces enhanced control over the installation of Windows updates and an improved troubleshooting experience.