Windows 10 build 10138

Windows 10 build 10138 is a build of Windows 10. It contains many improvements over build 10135. The desktop UI (the look and feel of the controls, title bars, and desktop applications) has been updated to better suit the overall cohesion of the user interface. The start menu icon has become slightly brighter. This build is the first to include the Microsoft Edge branding in the new web browser. It also includes a new dark theme for Edge. The taskbar expand button icon has been updated. It also changes the default wallpaper as well.

History
This build has potentially the most bizarre leak method for any Windows build. On 28 June 2019, BetaWiki Discord user lucasm uploaded a 7z file with a password added called "payrespects.7z", containing an x64 Pro ISO of this build. The password then had to be guessed by other users of the BetaWiki Discord, with lucasm giving hints. Applegame12345 was the first user to find the password and install the build. Windows 10 build 10143 was also leaked via a similar 'game' two days later.