4x CD-ROM drive required for CD installations.System processor should support at least Streaming SIMD Extensions 2 (SSE2) instruction set.Hardware and operating system requirements (client and server) Note: Windows Home Server Edition is not supported. Windows: natively installed & Windows 8, Windows 7 or Vista (SP1) with UAC on, Windows Server 2011, Windows Server 2008 R2, Windows Server 2008, Windows Server 2008 – Terminal Server Config., Windows Server 2003 (SP2), and Windows Small Business Server 2008 Windows Server 2008 R2, Windows Server 2008, and Windows Server 2003 (SP2), including 64-bit, natively installed.Windows Server 2012, Windows Small Business Server 2011, Small Business Server 2008.Windows Vista (SP1 or later), all editions including 64-bit, natively installed.Windows 7, all editions including 64-bit, natively installed.Windows 8, all editions including 64-bit, natively installed.QuickBooks Enterprise 2015 System Requirements