Windows server 2008 it is a high performance and most secure OS for servers at its time, It enhances your networking and developing environment. Download Windows Server 2008 iso from here. Windows server 2008 (sometimes abbreviated as "Win2K8" or "W2K8") is one of Microsoft Windows' server line of operating systems.
Released to manufacturing on February 4, 2008, and officially released on February 27, 2008, it is the successor to Windows Server 2003, released nearly five years earlier. Windows server 2008 Beta 1 was released on 27 July 2005, Beta 2 was announced and released on 23 May 2006 at WinHEC 2006 and Beta 3 was released publicly on 25 April 2007. Release Candidate 0 was released to the general public on 24 September 2007 and Release Candidate 1 was released to the general public on 5 December 2007.
Windows Server 2008 was released to manufacturing on 4 February 2008 and officially launched on 27 February 2008. A second release, named Windows Server 2008 R2, was released to manufacturing on July 22, 2009. Windows Server 2008 includes a variation of installation called Server Core.
Server Core is a significantly scaled-back installation where no Windows Explorer shell is installed. All configuration and maintenance is done entirely through command-line interface windows, or by connecting to the machine remotely using Microsoft Management Console. However, Notepad and some control panel applets, such as Regional Settings, are available.