Microsoft Virtual Server is a virtualization solution with the purpose of facilitates the innovation of virtual machines on the Windows XP, Windows Vista and Windows Server 2003 operating systems.  Virtual equipment are produced and managed through an IIS web-based interface or else through a Windows client application tool called VMRCplus.
The current version is Microsoft Virtual Server 2005 R2 SP1. Recent features taking part in R2 SP1 include Linux guest operating system support, Virtual Disk Precompactor, SMP (but not in support of the Guest OS), x86-64 (x64) Host OS support (but not Guest OS support), the capability to mount virtual hard drives on the host OS and supplementary operating systems together with Windows Vista. It furthermore provides a Volume Shadow Copy writer which enables live backups of the Guest OS on a Windows Server 2003 or Windows Server 2008 Host. A utility to mount VHD images is additionally incorporated since SP1. Virtual Machine Additions in support of Linux are downloadable. Officially supported Linux guest operating systems include Red Hat Enterprise Linux versions 2.1-5.0, Red Hat Linux 9.0, SUSE Linux and SUSE Linux Enterprise Server versions 9 and 10. [1]