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 and it is the successor to Windows NT4.0, and is the last version of Microsoft Windows to display the Windows NT designation. It is succeeded by Windows XP and Windows Server 2003, during development, Windows 2000 was known as Windows NT5.0. Four editions of Windows 2000 were released, Professional, Server, Advanced Server, and Datacenter Server, Windows 2000 introduces NTFS3.0, Encrypting File System, as well as basic and dynamic disk storage. Support for people with disabilities was improved over Windows NT4.0 with a number of new assistive technologies, the Windows 2000 Server family has additional features including the ability to provide Active Directory services. Windows 2000 can be installed either a manual or unattended installation. Microsoft marketed Windows 2000 as the most secure Windows version ever at the time, however, it became the target of a number of high-profile virus attacks such as Code Red and Nimda. 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. Windows 2000 is a continuation of the Microsoft Windows NT family of operating systems, the original name for the operating system was Windows NT5.0 and its Beta 1 was released in September 1997, followed by Beta 2 in August 1998. On October 27,1998, Microsoft announced that the name of the version of the operating system would be Windows 2000. Windows 2000 Beta 3 was released in January 1999, NT5.0 Beta 1 was similar to NT4.0, including a very similar themed logo. NT5.0 Beta 2 introduced a new boot screen. The new login prompt from the version made its first appearance in Beta 3 build 1946. The new, updated icons first appeared in Beta 3 build 1976, the Windows 2000 boot screen in the final version first appeared in Beta 3 build 1994. Windows 2000 did not have a codename because, according to Dave Thompson of Windows NT team, Windows 2000 Service Pack 1 was codenamed Asteroid and Windows 2000 64-bit was codenamed Janus. During development, there was a build for the Alpha which was abandoned some time after RC1 after Compaq announced they had dropped support for Windows NT on Alpha. From here, Microsoft issued three release candidates between July and November 1999, and finally released the system to partners on December 12,1999. The public could buy the version of Windows 2000 on February 17,2000
Improvements in Windows Explorer: "Web-style" folders, media preview and customizable toolbars
Windows 2000's Computer Management console can perform many system tasks. This image shows a disk defragmentation in progress.
The Recovery Console is usually used to recover unbootable systems.