Vista requirementsMicrosoft Vista Home Basic• 800-megahertz (MHz) 32-bit (x86) processor or 800-MHz 64-bit (x64) processor• 512 megabytes (MB) of system memory• DirectX 9-class graphics card• 32 MB of graphics memory• 20-gigabyte (GB) hard disk that has 15 GB of free hard disk space• Internal or external DVD drive• Internet access capability• Audio output capability Microsoft Vista Home Premium, Microsoft Vista Business, Microsoft Vista Enterprise, and Microsoft Vista Ultimate• 1-gigahertz (GHz) 32-bit (x86) processor or 1-GHz 64-bit (x64) processor• 1 GB of system memory• Windows Aero-capable graphics card• 128 MB of graphics memory• 40-GB hard disk that has 15 GB of free hard disk space (the 15GB of free space provides room for temporary file storage during the install or upgrade.)• Internal or external DVD drive• Internet access capability• Audio output capability