Office 2003 is incompatible with Windows NT 4.0, Windows 98, Windows ME and earlier versions of Windows. Minimum required operating systems for Office 2003 are Windows 2000 SP3 or later, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, Windows 7 and Windows Server 2008 R2. It is officially unsupported on Windows 8, Windows Server 2012, or later versions of Windows.
