Untrusted Font Blocking

This security feature provides a global setting to prevent programs from loading untrusted fonts. Untrusted fonts are any font installed outside of the %windir% -> Fonts directory. This feature can be configured to be in 3 modes: On Off and Audit. By default it is Off and no fonts are blocked. If you aren’t quite ready to deploy this feature into your organization you can run it in Audit mode to see if blocking untrusted fonts causes any usability or compatibility issues.

    The policy is located under of Local Group Policy Editor.

Additional Information

  1. Registry path is:

    HKLM -> SOFTWARE -> Policies -> Microsoft -> Windows NT -> MitigationOptions!MitigationOptions_FontBocking

  2. The Administrative Template path is:

    System -> Mitigation Options


* Making mistakes while changing registry values can affect your system adversely. We recommend you to create a System Restore point before making registry manipulation. If you're new to Registry Editor, read this beginner's guide.
** To locate the registry and administrative template path, checkout beginner's guide.
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