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{{ safesubst:#invoke:Unsubst||$N=Use mdy dates |date=__DATE__ |$B= }} {{ safesubst:#invoke:Unsubst||date=__DATE__|$B= {{#invoke:Infobox|infobox}} }} Windows 2000 is an operating system for use on both client and server computers. It was produced by Microsoft and released to manufacturing on December 15, 1999<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> and launched to retail on February 17, 2000.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> It is the successor to Windows NT 4.0, and is the last version of Microsoft Windows to display the "Windows NT" designation.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> It is succeeded by Windows XP (released in October 2001) and Windows Server 2003 (released in April 2003). During development, Windows 2000 was known as Windows NT 5.0.{{ safesubst:#invoke:Unsubst||date=__DATE__ |$B= {{#invoke:Category handler|main}}{{#invoke:Category handler|main}}[citation needed] }}

Four editions of Windows 2000 were released: Professional, Server, Advanced Server, and Datacenter Server;<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> the latter was both released to manufacturing and launched months after the other editions.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> While each edition of Windows 2000 was targeted at a different market, they shared a core set of features, including many system utilities such as the Microsoft Management Console and standard system administration applications.

Support for people with disabilities was improved over Windows NT 4.0 with a number of new assistive technologies,<ref name="Accessibility">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> and Microsoft increased support for different languages<ref name="Languages">Microsoft Support KB 292264: List of Languages Supported in Windows 2000, Windows XP and Windows Server 2003.</ref> and locale information.<ref name="Locales">Windows 2000 List of Locale IDs and Language Groups.</ref>

All versions of the operating system support NTFS 3.0,<ref name=NTFS3>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Encrypting File System, as well as basic and dynamic disk storage.<ref name="Storage">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The Windows 2000 Server family has additional features,<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> including the ability to provide Active Directory services (a hierarchical framework of resources), Distributed File System (a file system that supports sharing of files) and fault-redundant storage volumes. Windows 2000 can be installed through either a manual or unattended installation.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Unattended installations rely on the use of answer files to fill in installation information, and can be performed through a bootable CD using Microsoft Systems Management Server, by the System Preparation Tool.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Microsoft marketed Windows 2000 as the most secure Windows version ever at the time;<ref name="cybersafepr">{{#invoke:citation/CS1|citation |CitationClass=pressrelease |type=Press release }}</ref> however, it became the target of a number of high-profile virus attacks such as Code Red and Nimda.<ref>Code Red/Nimda Worm Activity as seen at Archvillain.com</ref> For ten years after its release, it continued to receive patches for security vulnerabilities nearly every month until reaching the end of its lifecycle on July 13, 2010.<ref name="Lifecycle" />


Windows 2000 sections
Intro  History  New and updated features  Deployment  Editions  Service packs  Security  Support lifecycle  Total cost of ownership  See also  References  Further reading  External links  

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