Vista version of the set of a single activation code to determine the installation version

In order to simplify the release of Windows Vista, and make it easier for users to upgrade, Microsoft will include a variety of retail versions of the operating system in a DVD disc. Instead of releasing a separate DVD disc for each Vista release.

In the past, Microsoft burned various versions of the Windows client operating system to separate platters. In what it calls "Windows Anytime Upgrade" - the purpose of the action is to reduce the cost of Microsoft, but also to make the user's upgrade more convenient - users buy a Windows Vista DVD installation disk, it is equivalent to buy All retail versions of Vista, and the system installed by the user depends on the activation key obtained by the user, and the key will determine the version of the system that is ultimately installed on the user's computer.