What does HRESULT 0x80290203 (TBSIMP_E_INVALID_CONTEXT_PARAM) mean?

TBSIMP_E_INVALID_CONTEXT_PARAM

The TBS context parameters do not satisfy the API contract

TBSIMP_E_INVALID_CONTEXT_PARAM (0x80290203) is configuration/parameter validation for the context itself, before ordinary TPM resource or command errors.

Evidence to capture

Record the complete context-parameter structure, version, flags, reserved fields, size, architecture, and API entry point. Compare byte-for-byte with documented initialization requirements.

Focused correction

Initialize all fields to a supported combination and use the correct structure version/size. If context creation succeeds but resources are unavailable, handle that later result separately.

Technical references

• Microsoft: Resource Virtualization in TBS.
• Microsoft: Command Scheduling in TBS.
• Microsoft: About TPM Base Services.
• Microsoft: Power Management in TBS.