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Windows Anytime Upgrade (Add Features to Windows) was a service by Microsoft introduced in Windows Vista that facilitated upgrades across successive editions of Windows Vista. [1] Prices for upgrades purchased through Windows Anytime Upgrade were lower than prices for upgrades purchased at retail. [2][3] Windows Anytime Upgrade is included in ...
Windows Vista editions
Comparison of Microsoft Windows versions
Windows Vista - Wikipedia ... Windows Vista
System Locked Pre-installation
Microsoft Windows version history
Microsoft Product Activation is a DRM technology used by Microsoft Corporation in several of its computer software programs, most notably its Windows operating system and its Office productivity suite. The procedure enforces compliance with the program's end-user license agreement by transmitting information about both the product key used to ...
Windows 7 editions