The 64-bit version of Windows Vista can be obtained in retail only if you purchase the Ultimate Edition of Microsoft’s new operating system.
According to the CompUSA’s product pages, Windows Vista Basic, Home Premium and Business ship with 32-bit DVD only, while the Ultimate comes with both 32-bit and 64-bit versions.
CompUSA.com: Microsoft Windows Vista Home Premium - 66L-00002 - Software » Operating Systems » Windows
Windows Vista Basic, Home Premium and Business all ship with 32-bit DVD and information on obtaining 32-bit CDs or a 64-bit DVD, additional fees may apply.
CompUSA.com: Microsoft Windows Vista Ultimate - 66R-00002 - Software » Operating Systems » Windows
Windows Vista Ultimate ships with 32-bit and 64-bit DVD and information on obtaining 32-bit CDs, additional fees may apply.
The Vista Ultimate is priced at $399 at CompUSA, but it can be found at Amazon
