MICROSOFT Windows Vista Release Candidate 1 Customer Preview Program ~ 32 & 64 BitThe product is the Microsoft Windows Vista Release Candidate 1 Customer Preview Program, available in both 32-bit and 64-bit versions. This operating system DVD includes English language support and a standard license category. Designed specifically for Microsoft Windows Vista, this program allows for the installation and use of the operating system on one device. Made by Microsoft in the United States, this release candidate is a reliable choice for those looking to pre-test and experience the new features and improvements of Windows Vista before its official release.