http://www.freedownloadus.net/2013/07/microsoft-office-2010-professional-plus.html   ======== 500-megahertz (MHz) processor or later versions; 1 gigahertz (GHz) required for Microsoft Outlook with Business Contact Manager. Memory: 256 megabytes (MB) of RAM or higher; 512 MB recommended for graphics features, Microsoft Outlook Instant Search, Microsoft Outlook with Business Contact Manager, Communicator, and certain advanced functionality. Operating system : Windows 7, 8,  Xp, Vista