Windows 2000
English: Windows 2000

Windows 2000
Part of the Microsoft Windows family
Windows Logo 1995.svg
Windows 2000
Initial releaseDecember 15 info]
Stable release5.0 SP4 Rollup 1 v2 (5.0.3700.6690) (February 17 info]
Source modelShared source[1]
LicenseMicrosoft EULA
Kernel typeHybrid kernel
Support status
Unsupported as of July 13, 2010

Windows 2000 (also known as Win2K, W2K, Win2000 or Windows 2K) is an operating system that was designed to work with computers that have either single or multiple processors. It was designed for 32-bit Intel x86 computers. It is part of the Microsoft Windows NT line of operating systems and was released to manufacturing on December 15, 1999 and officially on February 17, 2000. Windows 2000 comes in four versions: Professional, Server, Advanced Server, and Datacenter Server. Additionally, Microsoft offers Windows 2000 Advanced Server - Limited Edition and Datacenter Server - Limited Edition, which were released in 2001 and runs on 64-bit Intel Itanium processors. Windows 2000 was designed for businesses, but it was also popular with home users. A Home Edition of Windows 2000, codenamed Neptune, was planned, but was never released.

Windows 2000 uses two 'modes' - a 'User Mode' and a 'Kernel Mode'. The Kernel Mode is specially for hardware drivers (drivers tell the computer how to 'speak' to something) and allows drivers to 'speak' to things in the computer. The User Mode is for computer programs to run in without fear of causing harm to the computer.

All versions of Windows 2000 have things in common, including many system utilities such as the Microsoft Management Console (MMC) and standard system management applications such as a disk defragmentation utility. There is lots of support for different languages and for people with disabilities. Windows 2000 supports the Windows NT filesystem NTFS 5, the Encrypted File System (EFS), as well as basic and dynamic disk storage. Dynamic disk storage allows different types of volumes to be used (a volume is an area of storage on a hard disk that has been formatted with its own file system structure). The Windows 2000 Server version has many more features, including the ability to provide Active Directory services (a way of organising resources such as printers, users and group), a distributed file system (a file system that supports sharing of files) and fault-redundant storage volumes.

Windows 2000 can be installed and deployed to an enterprise through either an attended or unattended installation. 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 (SMS), by the System Preparation Tool (Sysprep).


Windows 2000 was created from the Microsoft Windows NT operating system versions. It was originally called Windows NT 5.0 but Microsoft changed the name to Windows 2000 on October 27th, [1]. It was also the first Windows version that was released without a code name. The first software test version (also known as a beta version) for Windows 2000 was released on September 27, 1997. Several more test versions were released until Beta 3, which was released on April 29, 1999. Microsoft further issued three more test versions from between July to November 1999. They then finally released Windows 2000 to partners on [2]. The public received the full version of Windows 2000 on February 17, 2000 and the press immediately called it the most stable operating system Microsoft had ever released. Novell (a competitor of Microsoft) did not think that Microsoft's new directory service product (part of Windows 2000) was as good as their own [3]. On September 29, 2000, Microsoft released Windows 2000 Datacenter. Microsoft released Service Pack 1 (SP1) on August 15, 2000, Service Pack 2 (SP2) on May 16, 2001, Service Pack 3 (SP3) on August 29, 2002 and its last Service Pack (SP4) on June 26, 2003. Microsoft has said that they will not release a Service Pack 5, but instead, have offered an "Update Rollup" for Service Pack 4. Microsoft stopped developing their Java Virtual Machine (JVM) for Windows 2000 in Service Pack 3.

Microsoft has replaced Windows 2000 Server products with Windows Server 2003, and Windows 2000 Professional with Windows XP Professional. Windows Neptune started development in 1999, and was supposed to be the home-user edition of Windows 2000. However, the project took a long time to create and only one pre-test (alpha version) release was created. Windows Me was released instead and the Neptune project was incorporated into the development of Windows XP. The only elements of the Windows project which were included in Windows 2000 were the ability to upgrade from Windows 95 or Windows 98, and support for the FAT32 file system.

Several notable security flaws have been found in Windows 2000. Code Red and Code Red II were famous computer worms that used problems with indexing service of Windows 2000's Internet Information Services (IIS) to caused a security problem. In August 2003, two major worms named the Sobig worm and the Blaster worm began to attack millions of Microsoft Windows computers and caused many problems for system administrators and computer operators who used Windows 2000. This was very embarrassing for Microsoft, and caused many corporations and governments to look carefully at Microsoft's security problems.

Windows 2000 is the last version of Windows that does not require any Pentium instructions, and is therefore the last version that will run on a 486.

Other Languages
العربية: ويندوز 2000
azərbaycanca: Windows 2000
Bân-lâm-gú: Windows 2000
беларуская: Windows 2000
български: Windows 2000
bosanski: Windows 2000
català: Windows 2000
Чӑвашла: Windows 2000
čeština: Windows 2000
Ελληνικά: Windows 2000
English: Windows 2000
español: Windows 2000
Esperanto: Windows 2000
euskara: Windows 2000
français: Windows 2000
galego: Windows 2000
한국어: 윈도우 2000
hrvatski: Windows 2000
Bahasa Indonesia: Windows 2000
íslenska: Windows 2000
italiano: Windows 2000
עברית: Windows 2000
қазақша: Windows 2000
kurdî: Windows 2000
Latina: Windows 2000
latviešu: Windows 2000
lietuvių: Windows 2000
magyar: Windows 2000
Bahasa Melayu: Windows 2000
မြန်မာဘာသာ: Windows 2000
Nederlands: Windows 2000
oʻzbekcha/ўзбекча: Windows 2000
ភាសាខ្មែរ: បង្អួចឆ្នាំ 2000
polski: Windows 2000
português: Windows 2000
română: Windows 2000
русский: Windows 2000
slovenčina: Windows 2000
slovenščina: Windows 2000
српски / srpski: Виндоус 2000
srpskohrvatski / српскохрватски: Windows 2000
svenska: Windows 2000
Tagalog: Windows 2000
тоҷикӣ: Windows 2000
Türkçe: Windows 2000
українська: Windows 2000
vèneto: Windows 2000
Tiếng Việt: Windows 2000
吴语: Windows 2000
ייִדיש: Windows 2000
粵語: Windows 2000
中文: Windows 2000