64-bit edition of Windows Vista or Windows 7 required for Adobe Premiere Pro and After Effects.64-bit operating system required: Microsoft® Windows Vista® Home Premium, Business, Ultimate, or Enterprise with Service Pack 1 (Service Pack 2 recommended) or Windows® 7.64-bit support required: Intel® Pentium® 4 or AMD Athlon® 64 processor (Intel Core™2 Duo or AMD Phenom® II recommended) Intel Core 2 Duo or AMD Phenom® II required for Adobe Premiere Pro.