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TPM_E_KEY_NOT_LOADED
TPM_E_KEY_NOT_LOADED means the TPM-backed key required by the operation is not currently loaded. It can follow a key-handle lifecycle error, a device reset, or a failed open/load sequence.
What to check
- Open or load the key through the Platform Crypto Provider before calling an operation that requires an active key handle.
- Do not reuse a key handle after a provider reset, process restart, or handle close.
- Check for an earlier key-open, parent, or authorization failure that prevented the load operation from completing.
Microsoft: NCryptOpenStorageProvider
Microsoft: CNG key storage providers
Microsoft: TPM and PCP error codes
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