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ERROR_HV_SMX_ENABLED
Hyper-V rejected the current firmware security state
ERROR_HV_SMX_ENABLED reports that Safer Mode Extensions (SMX), associated with Intel trusted-launch support, are enabled in BIOS/UEFI at the point where the Hyper-V operation checks platform configuration. The code is about that specific firmware state, not a generic explanation of measured launch or Secure Boot.
Diagnostic checks
- Confirm the exact Hyper-V or virtualization operation returning the HRESULT and capture the host firmware and virtualization-security configuration.
- Check whether TXT/SMX or a vendor setting that enables it changed with a BIOS update, reset, or security-baseline deployment.
- Compare the host with a known-working machine using the same hypervisor version and hardware generation.
Recovery boundary
Change firmware security settings only when the owning Hyper-V scenario and hardware documentation require it. Do not disable platform security features simply because SMX appears in the symbolic name; first establish the unsupported state for the failing operation.
References
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