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HNS_REGKEY_FAILURE
HNS_REGKEY_FAILURE is an HRESULT used by Windows Host Networking Service (HNS). It indicates that HNS could not read, write, or interpret registry data required for the operation.
What to check for HNS_REGKEY_FAILURE
- Inspect HNS and system event logs for a more specific registry, permission, or configuration failure.
- Check service-account access and avoid manually deleting HNS-related registry data.
- Repair the underlying host configuration before recreating networks or endpoints.
For HNS_REGKEY_FAILURE, Microsoft documentation on Windows container networking and HNS
Diagnostic interpretation of HNS_REGKEY_FAILURE
HNS_REGKEY_FAILURE has the HRESULT value 0xC03B001A. AllStat records the condition as “Failed to process registry key.”. For HNS_REGKEY_FAILURE, in practice, interpret that wording at the boundary owned by the Windows component or COM interface that returned the HRESULT, rather than treating the value as a generic Windows message.
Evidence to capture for HNS_REGKEY_FAILURE
- Record the exact COM method or Windows API, its input object, the calling thread, and the full 0xC03B001A value before a wrapper converts it to an exception or Boolean result.
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions HNS_REGKEY_FAILURE or the hns / regkey operation.
- For HNS_REGKEY_FAILURE, compare the failing machine with a working one at the same configuration boundary: component version, policy, registration, identity, and target resource.
Retry and recovery for HNS_REGKEY_FAILURE
Retry HNS_REGKEY_FAILURE only when the owning API documents a transient state or after the condition described as “Failed to process registry key.” has changed. For HNS_REGKEY_FAILURE, configuration, policy, format, and authorization failures normally require correction first; an immediate loop can hide the original call site and add secondary errors.
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