Assume that you upgrade from Windows 8 to Windows 8.1 Preview. At the end of the Windows 8.1 Preview lifespan, you may not be notified to upgrade to the release version of Windows 8.1.
Windows migrates your Windows 8 license to Windows 8.1 on upgrade. This process sets certain policies that prevent the end-of-life notification for the prerelease version from being shown.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about software update terminology, click the following article number to view the article in the Microsoft Knowledge Base:
824684 Description of the standard terminology that is used to describe Microsoft software updates