Hardware: 500-MHz (or higher) processor; 1-GHz processor required for Outlook with Business Contact Manager 256 MB or more RAM; 512 MB recommended for graphics features, Outlook Instant Search, Outlook with Business Contact Manager, Communicator, and certain advanced functionality; 1 GB recommended for contextual spell-checking feature in Word 3.5 GB available hard-disk space 1024x768-pixel (or higher) display CD or DVD drive Software: Windows Server 2003 R2 (32-bit or 64-bit) with MSXML 6.0 installed; Windows Server 2008 (32-bit or 64-bit); Windows XP with SP3 (32-bit only); Windows Vista with SP1 (32-bit or 64-bit); Windows 7 (32-bit or 64-bit); Terminal Server and Windows on Windows (WOW) (which allows installing 32-bit versions of Office 2010 on 64-bit operating systems) are also supported For Communicator — connectivity to Office Communications Server 2007 or later Internet Explorer 6.0 or later, 32-bit browser only; Internet Explorer 7 or later required to receive broadcast presentations Additional requirements for some features or advanced functionality: For graphics hardware acceleration — DirectX 9.0c–compatible graphics card with 64 MB or more graphics RAM For speech recognition — close-talk microphone and audio output device For certain advanced functionality in Outlook — connectivity to Microsoft Exchange Server 2000 or later For Information Rights Management features — access to Windows Server 2003 with SP1 or later running Windows Rights Management Services For certain inking features — Windows XP Tablet PC Edition or later For certain advanced collaboration functionality — Connectivity to Windows Server 2003 with SP1 or later running Windows SharePoint Services or Office SharePoint Server 2007 or later For Instant Search — Windows Desktop Search 3.0 For Dynamic Calendars — server connectivity For PowerPoint Slide Library — Office SharePoint Server 2007 or later For interactive guides — Silverlight 3 or later