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| VSS_E_UNEXPECTED | VSS_E_PROVIDER_NOT_REGISTERED |
VSS_E_PROVIDER_ALREADY_REGISTERED
VSS_E_PROVIDER_ALREADY_REGISTERED means that VSS already has a registration for the provider identity being added. Registering the same provider again can create conflicting assumptions about provider ownership and setup.
How to investigate for VSS_E_PROVIDER_ALREADY_REGISTERED
- List installed providers and compare the provider GUID with the one being registered.
- Use an upgrade or repair path supplied by the provider vendor instead of registering a duplicate entry.
- Remove stale registrations only with the provider's documented uninstall or recovery procedure.
Microsoft: VSS providers and administration
Diagnostic interpretation
This result has the HRESULT value 0x80042303. AllStat records the condition as “The provider has already been registered.”.
Evidence to capture
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions this result or the vss / provider / already / registered operation.
- check the documented return contract of the specific API because the same HRESULT can require different recovery in different interfaces.
Retry and recovery
” has changed.
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