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STATUS_APPHELP_BLOCK
Compatibility policy intentionally prevented launch
Windows returns STATUS_APPHELP_BLOCK from application packaging, registration, cache, or activation handling. The Application Compatibility framework selected a blocking mitigation or compatibility decision for this executable. This is a policy result, not proof that the image is corrupt.
Identify the matching AppCompat database entry, executable identity, version, publisher, and compatibility event. Removing databases blindly can disable protections or application-specific fixes.
A reinstall normally does not remove an intentional compatibility block. Compare the exact executable version and publisher with the applied compatibility entry, then confirm whether an updated application or policy is the supported resolution.
References
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