Windows 8 Build 8250.0.winmain win8beta.120217-1520：修订间差异

This is the earliest known build to drop the 2001 flag logo and replace it with the new tilted window logo,[b] and most user interface elements like the Charms bar, Windows Setup and iconography such as the disk drive icon used to indicate the currently-running Windows installation in the Computer system folder were all updated to reflect the newly-introduced branding. Certain resources (such as the Windows Anytime Upgrade application) still make use of the older logo design.

A new set of wallpapers and Start screen patterns exclusive to this build which feature an aquatic theme (itself an internal developer joke on the operating system having just reached the Beta milestone, previously done in the preceding operating system with build 7000) was added; although the latter patterns were already introduced by the time build 8220 was compiled. The default desktop wallpaper was changed to a dark teal-colored wallpaper containing a Metro-style betta fish along with a large number 8 on the left-hand side, and the default lock screen background was changed to a stock photograph of a coral reef taken by photographer Reinhard Dirscherl, licensed from Getty Images and altered to omit the background fish. Similarly, the boot screen logo bitmap was changed to depict a betta fish to reflect the current state of development.

System crashes no longer display a sad emoticon by default if a Japanese language pack is present and is being actively used. This change is also present in server builds irrespective of whether a Japanese language pack is active.