Following are the client versions of Windows Vista. Except for Starter 2007, all Vistas are available in 32- and 64-bit versions. See Windows Vista.Vista Starter 2007A 32-bit version for PCs outside the U.S. No support for the Aero interface, and only three concurrent applications can run at once.Vista Home BasicSupports 8GB memory, but not the Aero interface.Vista Home PremiumSupports 16GB memory and Aero interface. Includes the Media Center interface introduced with XP. See Windows Media Center.Vista BusinessSupports 128GB memory. Includes IIS Web server, Remote Desktop, backup utility and support for dual processors.Vista EnterpriseSame as Vista Business plus BitLocker encryption, limited virtualization (Virtual PC Express) and Subsystem for Unix Applications (SUA).Vista UltimateFor PC enthusiasts. Combines Home Premium and Enterprise versions plus support for podcasting and advanced gaming.