Win10 Preview 14251 Update Rollup

Microsoft has pushed the Win10 RS1 preview version 14251 to the Insider fast channel users. This update mainly fixes some problems in the previous version, and of course includes the further improvement of Windows10 < unified core. Details are as follows:

Win10 Preview 14251 Update Rollup:
• Fixed a bug in the Windows graphics stack that caused some games to appear when switching to full screen, changing resolution or booting collapse. Affected games include Wizard 3, Radiation 4, Tomb Raider Series, Assassin's Creed Series, Alloy Equipment V, etc.
• Fixed an intermittent crash in some screen reading applications, including built-in narrators and magnifiers and other third-party aids.
• Fixed a problem with file explorers crashing frequently when DPI was set to 175%.
In addition, Microsoft recently updated Cortana and Xbox apps for Insider users