Windows "Longhorn" build 4042 (with a build tag of 4042.main.030905-1800) is a Milestone 7 build of the Microsoft Windows "Longhorn" operating system. It was an earlier compile of 4042, and as such, was technically a Milestone 6 build.
Windows Explorer in build 4042 showing the Preview Pane. Courtesy of UX.Unleaked.
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