GitHub - WorkingHardInIT/Invoke-TestAndFixHyperV2025ReadinessForLegacyVMs: Hyper‑V 2025 introduces updated ACPI device identifiers that older guest operating systems do not recognize on first boot. Without pre-seeding the ACPI\MSFT1000 and ACPI\MSFT1002 registry keys, affected VMs may fail to boot after migration with a 0x7B (INACCESSIBLE_BOOT_DEVICE) or similar ACPI initialization failure.

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Name		Name	Last commit message	Last commit date
Latest commit History 2 Commits
FixMyLegacyVMOnHyperV-2025.cmd		FixMyLegacyVMOnHyperV-2025.cmd
Invoke-TestAndFixHyperV2025ReadinessForLegacyVMs.ps1		Invoke-TestAndFixHyperV2025ReadinessForLegacyVMs.ps1

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Hyper‑V 2025 introduces updated ACPI device identifiers that older guest operating systems do not recognize on first boot. Without pre-seeding the ACPI\MSFT1000 and ACPI\MSFT1002 registry keys, affected VMs may fail to boot after migration with a 0x7B (INACCESSIBLE_BOOT_DEVICE) or similar ACPI initialization failure.