By default Add features to Windows 8.1 is available for all administrators. If you enable this policy setting the wizard will not run.If you disable this policy setting or set it to Not Configured the wizard will run.
Policy path:
Windows Components\Add features to Windows 8.1
Scope:
Machine
Supported on:
At least Windows Server 2008 R2 or Windows 7
Registry settings:
HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\WAU!Disabled
Filename:
WindowsAnytimeUpgrade.admx