How to up-gradation windows server 2008 to windows server 2012 Main requirements Processor :- 1.4 GHZ , x64 RAM: minimum 512 MB Free hard disk: 32 GB DVD ROM Super VGA (800x600) or higher Existing Windows O/S 1)windows server 2008 standard with SP2 to Windows server 2012 standard 2) windows server 2008 enterprise with SP2 to Windows server 2012 datacenter 3)windows server 2008 datacenter with SP2 to Windows server 2012 datacenter 4) windows web server 2008 to windows server 2012 standard 5)windows server 2008 r2 standard with SP1 to windows server 2012 standard 6) windows server 2008 r2 enterprise with SP1 to windows server 2012 datacenter 7) windows server 2008 r2 datacenter with SP1 to windows server 2012 datacenter Active directory domain and services (ADDS) must be installed and configured DNS Server Install and configured both zones Functional level: windows server 2003 or higher Global catalog enable Full editions of Microsoft windows server 2012 DVD Run forest prep or domain prep from DVD media