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Windows Neptune

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Neptune was the codename for a version of the Windows operating system that was under development by Microsoft during 1999. It was based on Windows 2000 and was scheduled to be the first consumer version of Windows to be built on NT code, to replace the Windows 9x series.[1]

In early 2000, Microsoft merged the team working on Neptune with that developing Windows Odyssey, the upgrade to Windows 2000 for business customers. The combined team worked on a new project codenamed Whistler,[2][3] which was released at the end of 2001 as Windows XP.[4][5] In the meantime, Microsoft released another home user DOS-based operating system called Windows Me.[3]

Only one alpha build of Neptune, 5111, was released to testers under a non-disclosure agreement,[6] and later made its way to various beta collectors' sites and virtual museums.[7][8] Also, there were at least two other builds, which were Build 5000, which was released to very few people, and Build 5022.[citation needed] Build 5000 is very heavily debated.[citation needed] Files marked 5022 are in the Windows Mebeta.[citation needed]

In the early roadmap for Neptune's development (shown in the Anti-Trust documents) there were five service packs planned. In the Microsoft Anti-Trust documents, it shows that Neptune was to have a successor named Triton which would be a minor update with very few user interface changes, and service packs were planned for it. Internally, the project's name was capitalized as NepTune.[9]

[edit]FeaturesEdit

Neptune largely resembled Windows 2000, but some of the new features introduced such as the firewall, were later integrated into Windows XP as the Windows Firewall. It introduced a logon screen similar to that later used in Windows XP.[6] Neptune also experimented with a new user interface, called Activity Centers, for task-centered operations.[10][11]

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