Windows 10 build 10031

Windows 10 build 10031 is a private build of Windows 10, screenshots and a set of release notes were leaked by WZOR on 6th March 2015. At the time of writing, this build has not leaked to the general public. This build continues the process of UI and UX refinement that has been a major focus in development of Windows 10 recently. It is not known if Spartan is included in this build, as screenshots of it have not been leaked, despite Microsoft's promise at MWC 2015 that it would be included in the next public build. It can only be assumed that Spartan was still undergoing final testing and evaluation before being incorporated into fbl_impressive builds, ready for release. The iconography in Windows 10 continues to be refined in this release, replacing many of the outdated Windows Vista/7/8 icons.

New features
The current Windows 8.1 OOBE has been replaced in this build by a cloud-based one. This presumably enables Microsoft to update and fix problems in the OOBE without releasing new builds. However, it is noted that this most likely means that Windows 10 will require an Internet connection to complete setup.

The new lockscreen available in build 9926 by editing a registry key is enabled by default in build 10031. Therefore, it is likely that this will be enabled in the next public build.

Minor and major UI refinements continue to be made in new builds of Windows 10, to provide a more cohesive experience.