Windows 7 build 7231

Windows 7 build 7231 is a build of Windows 7, which was leaked on 12 June 2009. This is the last build to contain the beta fish wallpaper, before it was replaced by the default wallpaper used in the final version of Windows 7 in the next build. However, the beta fish wallpaper returned in Windows 8 build 7700.

Bugs and quirks

 * Running Disk Cleanup with administrator privilege causes the application to crash.