Policy

Block launching Universal Windows apps with Windows Runtime API access from hosted content.

Windows 11 25H2

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Policy overview

Key metadata and intent for this policy.

ClassComputer
CategoryWindows Components > App runtime
Supported onAt least Windows Server 2016, Windows 10

Supported OS tags: Windows10, Windows10RT, Windows11, WindowsServer2016

This policy setting controls whether Universal Windows apps with Windows Runtime API access directly from web content can be launched. If you enable this policy setting, Universal Windows apps which declare Windows Runtime API access in ApplicationContentUriRules section of the manifest cannot be launched; Universal Windows apps which have not declared Windows Runtime API access in the manifest are not affected. If you disable or do not configure this policy setting, all Universal Windows apps can be launched. This policy should not be enabled unless recommended by Microsoft as a security response because it can cause severe app compatibility issues.

Internal name
AppxRuntimeBlockHostedAppAccessWinRT
Policy ID
aa88451bdae7
Elements
0

Registry values

How enabled and disabled states update the registry.

Registry locationTypeEnabled valueDisabled value
HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System\BlockHostedAppAccessWinRTREG_DWORD
1
0

Policy elements

Inputs and configuration options exposed by this policy.

This policy has no additional user input fields.

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