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ERROR_VID_INVALID_PROCESSOR_STATE
ERROR_VID_INVALID_PROCESSOR_STATE is HRESULT 0xC037001D in the VID virtual-processor state machine area of the Windows virtualization stack. The built-in message names the immediate result; the useful custom context is the exact boundary: an operation that is not valid for the virtual processor's current lifecycle or execution state. Record the first returning operation and host-side event before a management layer retries or translates it.
What the code establishes
The VP exists, but its state—created, running, suspended, stopping, reset, or deleted—does not permit the requested transition. Record both expected and observed state at the call boundary.
Hyper-V architecture documentation identifies VID as the component that provides partition, virtual-processor, and memory-management services., many ERROR_VID_* values describe internal host objects rather than a public API that administrators should call directly. Accordingly, diagnose this result through the named object/state, the VMMS or Worker event chain, and the operation that produced it; do not invent a user-mode VID call from the constant name.
Neighboring result: STOP_PENDING is a specific transitional case. LIMIT_EXCEEDED concerns creating too many VPs. INVALID_PROCESSOR_STATE points to transition ordering for an existing VP.
Evidence that should survive remediation
| Evidence | Why it changes the diagnosis |
|---|---|
| VP state | Record state, run-thread ownership, index, and partition generation. |
| Requested transition | Keep start/run/stop/reset/delete operation and caller. |
| Prior transition | Locate the last successful state change and completion signal. |
| Concurrent control | Identify management, emulation, and cancellation threads touching the VP. |
Preserve identifiers and counts without dumping guest secrets or unrelated memory. Useful this result timestamps include the last successful operation, first failure, any automatic retry, and the object-generation change that followed.
Controlled diagnostic sequence
- Encode legal VP transitions and assert them before VID calls.
- Wait on completion events rather than assuming a command changed state synchronously.
- Make reset and teardown invalidate queued work.
- Run race tests among run, cancel, stop, and delete.
Reduce this result to one partition and as few VPs as possible. In the result trace, instrument each run, exit, cancel, stop, reset, and delete transition so an asynchronous completion is not mistaken for an immediate state change.
Read the comparison tests
Across these controls for it, preserve an operation that is not valid for the virtual processor's current lifecycle or execution state as the boundary under test.
| Control | Interpretation | Hold constant |
|---|---|---|
| Instrumented run/stop race — this result | Control run, cancel, intercept completion, stop, reset, and delete order. The first illegal transition explains it. | Keep one VP and one deterministic exit reason until ordering is proven. |
| One VP versus target count — it | If it appears only as processors are added, record the first failing index and capability/configuration limit. | Keep partition properties and host topology fixed. |
| Clean partition generation — it | A fresh partition changing it points to stale VP state, pending exits, or incomplete deletion rather than guest code. | Use identical VP indexes, registers, and run sequence in the result comparison. |
Avoid the wrong recovery
Repeated start/stop commands can obscure the first illegal VP transition behind it. Preserve run-thread, exit reason, pending intercept, cancellation, and state-completion order.
Acceptance test
Every control operation occurs from a documented state, and stress runs show no illegal transition or stale queued action. Repeat the original operation under the original supported conditions and retain one deliberate negative control. A management command succeeding on a different object is not sufficient to close this incident.
Technical references
These sources define it and the public Hyper-V architecture surrounding the internal state. They do not create a public user-mode VID API for the named object.
- Microsoft Open Specifications: HRESULT values — used to interpret the boundary.
- Microsoft: WHvCreateVirtualProcessor — used to interpret the boundary.
- Microsoft: WHvRunVirtualProcessor — used to interpret the boundary.
- Microsoft: WHvCancelRunVirtualProcessor — used to interpret the boundary.
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