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Hyper-V Errors — Virtual Machine Start Failures and Configuration Issues

Errorsystem

Overview

Fix Hyper-V virtual machine errors including start failures, checkpoint errors, networking issues, and conflicts with other virtualization software.

Key Details

  • Hyper-V is Windows built-in Type-1 hypervisor available on Windows 10/11 Pro, Enterprise, and Education
  • Enabling Hyper-V may prevent other hypervisors (VirtualBox, VMware) from using hardware virtualization
  • Common error: 'The virtual machine could not be started because the hypervisor is not running'
  • Hyper-V requires: 64-bit CPU with SLAT, hardware virtualization enabled, 4GB+ RAM
  • Dynamic memory allows VMs to share host RAM but can cause issues if the host runs low

Common Causes

  • Hypervisor not running despite Hyper-V feature being enabled
  • BIOS virtualization (VT-x/AMD-V) disabled
  • Conflict between Hyper-V and VirtualBox/VMware (both need hardware virtualization)
  • Insufficient RAM to start the VM with its configured memory allocation
  • Corrupted VM checkpoint (snapshot) preventing normal boot

Steps

  1. 1Verify hypervisor is running: systeminfo | find 'Hypervisor' in Command Prompt
  2. 2Enable hypervisor launch: bcdedit /set hypervisorlaunchtype auto then restart
  3. 3Enable Hyper-V feature: Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
  4. 4Fix VirtualBox conflict: VirtualBox 6.1+ supports Hyper-V coexistence with reduced performance
  5. 5Delete corrupted checkpoints: right-click VM > Checkpoints > delete the problematic checkpoint
  6. 6Reduce VM memory allocation or close other VMs to free host RAM

Tags

hyper-vvirtual-machinehypervisorvirtualizationvm-errors

Related Items

windows-wsl-errors-common

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Frequently Asked Questions

VirtualBox 6.1+ can run alongside Hyper-V but with reduced performance (no hardware-assisted virtualization). For full VirtualBox performance, disable Hyper-V.