As this build's lab isn't working on new features, but on ARM compatibility, there are only minor changes in the user interface: the window title is centered instead of being aligned to the left, the caption buttons are slightly bigger than in Windows 7, the branding is changed to "Microsoft Pre-Release Windows Operating System" (interestingly, unlike the later build 7871, and closer to 7875), and an IE 9 build is used instead of IE 8 RTM.
The characteristic "User Tile" seen in the older build 7850 isn't present here or disabled and the desktop background is the one already seen in Windows 7 RTM instead of the blue-green gradient Milestone 1 wallpaper that is found in builds 7850, 7875, 7880, and 7899. The kernel version number has also changed to version 6.2. It is the earliest known build to contain an incorrect font for both the title bar and watermark, as they incorporate Arial instead of Segoe UI; this issue would persist up until build 7899.
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