Windows Server 2003 (sometimes referred to as Win2K3) is a server operating system produced by Microsoft, introduced on 24 April 2003.
Windows Server 2003 (sometimes referred to as Win2K3) is a server operating system produced by Microsoft, introduced on 24 April 2003. An updated version, Windows Server 2003 R2, was released to manufacturing on 6 December 2005. Its successor, Windows Server 2008, was released on 4 February 2008.
According to Microsoft, Windows Server 2003 is more scalable and delivers better performance than its predecessor, Windows 2000.
On 13 July 2010, Windows Server 2003's mainstream support expired and the extended support phase began. During the extended support Phase, Microsoft continues to provide security updates; however, free technical support, warranty claims, and design changes are no longer being offered. Extended support is expected to last until 14 July 2015.