AppLocker Policy Converter 2.0.0.0, released by Microsoft, is a lightweight administrative utility designed to modernize existing AppLocker policies so they remain effective on current Windows builds. The program’s single purpose is to read legacy or manually crafted XML policy files, locate publisher rules that rely on the deprecated CN= format, and automatically rewrite them into a stronger chain anchored to certificates present in the AuthRoot and Trusted Root stores. During the same pass the converter injects a CiSigner rule reference, ensuring that subsequent policy deployments recognize the revised signatures and do not block trusted code. IT professionals typically invoke the tool while migrating AppLocker configurations from Windows 7/8-era domains to Windows 10/11 or when tightening rule sets to comply with stricter code-integrity requirements introduced by HVCI and Windows Defender Application Control. Because the utility operates in place on exported policy XML, it fits neatly into change-control workflows: administrators export the live policy with PowerShell, run the converter, inspect the diff, and re-import the updated file through Group Policy or MDM. No agent is installed on endpoints, so the process introduces no additional attack surface. The converter is classified under System Administration / Security Policy Tools, ships as a single stand-alone executable, and carries no external dependencies beyond the .NET runtime already present on management workstations. Version 2.0.0.0 is the first and therefore current release, and Microsoft documentation states that future AppLocker schema changes will be addressed through Windows updates rather than successive converter builds. AppLocker Policy Converter is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.
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