Windows 8.1 Preview

An article about pre-release versions of Windows 8.1. Unlike other versions of Windows, 8.1 is the only version where the final wallpaper set was introduced in the RTM build.

Builds 9483 and earlier
Build 9271, despite being newer than the RTM build of Windows 8, reverted:

Likely due to being forked from late development builds of Windows 8. However, the display names of the themes/wallpaper categories remain the same as Windows 8 RTM.
 * The default wallpaper to the one used in Windows 8 builds 8095 to 8195, 8277, 8305, 8432 to 8441, and 8520;
 * Theme1 to the one used in builds 8176 to 8441 and 8520;
 * Theme2 to the one used in builds 8148 to 8176, 8305 to 8432, 8422 to 8441, and 8520.

By build 9299, the wallpapers were reverted to the ones found in Windows 8 RTM. By build 9419, img0 was a duplicate of img3, replacing Windows 8 RTM's default wallpaper. While it is unknown if the unleaked build 9490 uses the final wallpaper set, the first known build to feature this set is the RTM build, 9600. One screenshot of build 9483 with the default wallpaper as seen in the RTM build exists, which is possibly a different compile from the currently leaked one.

Builds 9299 to 9415
At this point in development, Windows 8.1's lock screen wallpapers are identical to 8's.

Builds 9431 to 9483
By build 9431, img100 has been replaced with a new one; with the exception of img105, all of the lock screen wallpapers leftover from Windows 8 (img100, img101, img102 and img103) were reallocated to img101, img102, img103 and img104 respectively, replacing 8's img104.