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Windows NT 5.0 was the development-era name for the Windows release Microsoft renamed Windows 2000 in October 1998. Windows NT Workstation 5.0 became Windows 2000 Professional, while Windows NT Server 5.0 became Windows 2000 Server. Microsoft later announced Windows 2000’s release to manufacturing in December 1999, ahead of planned worldwide availability on February 17, 2000.
What did Windows NT 5.0 become?
Microsoft announced the name change on October 27, 1998. The company said that Windows NT Workstation 5.0 would be called Windows 2000 Professional and Windows NT Server 5.0 would be called Windows 2000 Server. The new name was intended to connect the product line with the year 2000; it did not represent a separate successor to NT 5.0.
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In that announcement, Microsoft framed Windows NT as the basis for its future PC operating systems, from consumer products to high-performance servers. That was the company’s stated direction at the time, not a neutral assessment of the market.
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Microsoft’s 1998 announcement described the editions by their intended roles. The positioning and SMP figures below are historical claims from that announcement, not a full compatibility guide or present-day recommendation.
| Edition | Microsoft’s period positioning | SMP support stated for new systems |
|---|---|---|
| Windows 2000 Professional | Business desktop operating system | Up to two-way SMP |
| Windows 2000 Server | Small- to medium-enterprise applications, web servers, workgroups, and branch offices | Up to two-way SMP |
| Windows 2000 Advanced Server | Departmental and application servers, database-intensive workloads, clustering, and load balancing | Up to four-way SMP |
SMP, or symmetric multiprocessing, refers to a system using multiple processors. The figures are the limits Microsoft cited for new systems in its 1998 product announcement; they should not be treated as a comprehensive statement of hardware compatibility.
What was announced during the beta period?
In September 1997, Microsoft announced a Windows NT 5.0 beta distribution to more than 200,000 developers. That number was Microsoft’s announcement figure, not an independently audited count. The beta announcement highlighted planned storage features including disk quotas and the encrypted file system. Beta-era announcements describe what Microsoft was emphasizing during development; they are not, by themselves, an exhaustive specification of the final product.
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When did Windows 2000 reach release to manufacturing?
Microsoft announced release to manufacturing (RTM) for Windows 2000 Professional, Server, and Advanced Server on December 15, 1999. It planned worldwide availability for February 17, 2000. RTM came before the planned general availability date; the latter is the schedule Microsoft announced, not a claim about every market’s distribution timing.
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Is Windows 2000 supported today?
Microsoft’s current general guidance says unsupported Windows versions do not receive software or security updates. The support page consulted does not give a Windows 2000-specific lifecycle date, so it does not establish that date. For a computer connected to a current network, treat Windows 2000 as a legacy operating system and do not assume it receives modern security updates.
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Sources
- Microsoft’s October 27, 1998 renaming announcement
- Microsoft’s September 23, 1997 beta announcement
- Microsoft’s December 15, 1999 RTM announcement
- Microsoft Support: What does it mean if Windows isn’t supported?
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