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If a restored Hyper-V virtual machine appears in Hyper-V Manager but will not power on, first check the destination host’s virtual switch mapping and the VM’s saved state. Microsoft documents both as causes when a VM restored to a new Hyper-V host fails at startup. If the restore or import itself failed, troubleshoot that step instead: a VM that was never registered has a different problem from one that fails when started.
Work through the checks below only when they fit your symptoms. Before deleting saved-state files, merging disks, or changing major VM settings, preserve the VM files and record the full error. Microsoft advises backing up critical VMs before merges, deletions, or major configuration changes in its Hyper-V backup, checkpoint, and storage troubleshooting guidance.
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First identify where the failure happens
Separate an import or restore failure from a startup failure. If the VM is absent from Hyper-V Manager, or the restore/import process reported an error, focus on the import and configuration path. If the VM is registered and fails only when you select Start, record the exact error and use the symptom-led checks below.
Note whether the VM moved to a different host, the Hyper-V host’s Windows version/build, how the VM was restored or imported, its configuration version, and whether its virtual disks use checkpoints. These details help distinguish host compatibility, saved-state, and disk-chain issues.
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13 checks for a restored Hyper-V VM that will not start
1. Capture the full startup error
Write down the complete message and error code before making changes. The wording can point toward a missing or inaccessible disk, a saved-state problem, a memory/configuration issue, or another host-side failure. Avoid treating different errors as if they had the same fix.
2. Confirm the restore completed and the VM is registered
Check whether the VM appears in Hyper-V Manager and whether the restore/import operation finished successfully. If it is missing or import failed, troubleshoot that operation rather than deleting saved-state files for a VM that may not have been registered correctly. Microsoft’s troubleshooting guidance treats missing VMs and startup/storage failures as distinct cases.
3. Check the VM’s virtual network mapping on the destination host
When a restored VM is moved to another host, compare the virtual network adapter or switch expected by the VM with the virtual switches available on the destination. A switch may have a different name there, or the expected switch may not exist. Microsoft’s article Restored Hyper-V virtual machines won’t start identifies an inconsistent network adapter name as a cause. Correct the mapping/name as appropriate, then try starting the VM before proceeding to saved-state changes.
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If the network mapping is corrected but the VM still fails to start, a saved state from the original host may conflict with the destination host’s machine configuration. Microsoft cites differences such as video state. In Hyper-V Manager, select the VM and use Delete Saved State, then try starting it again. This discards the saved session state; it is not the same as deleting the VM’s virtual disk.
5. Treat manual saved-state file removal as a last resort
Only if Hyper-V Manager’s saved-state action does not resolve the documented restore-related problem should you consider the manual fallback described by Microsoft: removing the VM’s .bin and .vsv files from its GUID-named folder. Confirm the folder belongs to the correct VM and preserve a backup before changing files. Do not delete virtual disks or checkpoint files as a substitute; they contain disk data, not just saved session state.
6. Verify the destination host supports the VM configuration version
Hyper-V hosts do not all support every VM configuration version. If the destination host is older or otherwise does not support the VM’s version, the VM may not be importable or runnable there. Check Microsoft’s Hyper-V VM configuration-version compatibility guidance. In some cases, Microsoft describes creating a new VM of the same generation on the destination and attaching the existing virtual disks, rather than importing an unsupported configuration.
7. Do not upgrade the VM configuration version until compatibility needs are clear
An upgrade may be appropriate for a newer host, but Microsoft says configuration-version upgrades cannot be reversed. A VM upgraded for one host may no longer start on a host that does not support the upgraded version. Before upgrading, identify every host on which the VM may need to run and keep a recoverable backup.
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8. Confirm every required VHD or VHDX is present and accessible
Check that the VM’s configured disk paths point to files that exist and that the Hyper-V host can access them. A missing, inaccessible, or damaged VHD/VHDX can block startup. Look for moved files, changed drive letters or mount points, and access restrictions before attempting any disk repair. Microsoft lists disk access and storage problems among Hyper-V startup and storage symptoms in its backup, checkpoint, and storage troubleshooting article.
9. Inspect checkpoints and the AVHDX chain before touching files
A checkpoint can create one or more differencing disks, commonly with the .avhdx extension. Compare the checkpoints shown in Hyper-V Manager with the VM’s disk files and identify which disks depend on one another. An AVHDX that is not visible as a checkpoint is not automatically safe to delete: it may still be part of the active disk chain. Microsoft’s checkpoint and storage guidance covers incomplete chains and related failures.
10. Check free storage and possible file locks
Confirm there is adequate free space on the volumes holding the VM configuration, virtual disks, and checkpoint files. Also consider whether a backup, antivirus scan, or another process is holding a file. Microsoft identifies sharing violation 0x80070020 as a possible symptom of a file being used by another process. Resolve the underlying space or lock issue rather than repeatedly retrying a disk operation.
11. Back up before checkpoint repair or disk merging
If evidence points to a checkpoint-chain problem, preserve the files before repair. Microsoft recommends merging differencing disks from child to parent using Hyper-V’s Edit Disk workflow. Follow the actual chain and verify each parent relationship; merging the wrong disk or deleting a chain member can lose access to the latest data. If the VM still will not start after a documented merge, Microsoft describes creating a new VM and attaching the final merged disk as an alternative.
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12. For a Windows 11 guest migrated from VMware, check security settings
This check is specific to a Windows 11 guest migrated from VMware to Hyper-V; it is not a universal fix for restored VMs. Follow Microsoft’s VMware-to-Hyper-V migration guidance to verify Secure Boot, TPM, and the Microsoft UEFI Certificate Authority template settings. Microsoft notes in that migration context that Windows 11 requires a TPM for Secure Boot and security compliance.
13. Review host symptoms and collect evidence before escalating
If none of the earlier checks fits, inspect whether the host has sufficient memory and whether Hyper-V Virtual Machine Management Service (VMMS) or other host services show problems. Gather the relevant Hyper-V-VMMS/Admin, System, and Application logs, plus the exact error, host build, VM configuration version, restore/import method, and VM, checkpoint, and disk-chain details. Microsoft’s general troubleshooting guidance provides symptom-specific diagnostic context. Avoid broad registry edits or deleting disk-chain files based on a generic checklist.
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| What you see | Start with | Important caution |
|---|---|---|
| Restore/import did not complete, or VM is missing from Hyper-V Manager | Resolve the import or registration issue first. | Saved-state deletion will not fix a VM that was never registered correctly. |
| VM is registered; host changed; startup fails | Check destination virtual switch mapping, then try Delete Saved State if needed. | Manual .bin/.vsv removal is a later fallback, not the first step. |
| Error mentions a disk, access, or storage problem | Verify disk paths and permissions, free space, locks, and the checkpoint chain. | Do not delete AVHDX files or merge disks without a backup and confirmed chain. |
| VM configuration version is unsupported on destination | Check host compatibility; consider a same-generation VM with existing disks where applicable. | Configuration-version upgrades cannot be downgraded. |
| Windows 11 guest was migrated from VMware | Check the migration-specific Secure Boot, TPM, and UEFI template requirements. | These steps do not apply to every restored VM. |
What to include when asking for help
If the VM still will not start, provide the exact error and code, host Windows version/build, source and destination host details, restore/import method, VM configuration version, and whether the failure happens at import or power-on. Include the VM’s disk paths and checkpoint/AVHDX layout, plus relevant Hyper-V-VMMS/Admin, System, and Application log events. That evidence makes it possible to distinguish a host compatibility issue from a saved-state conflict or a damaged/inaccessible disk chain.
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