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How to Fix Fix Hyper-V Not Starting or Virtual Machine Errors on Windows

Hyper-V not working? Virtual machines failing to start? "Hypervisor is not running" error? Fix Hyper-V Manager and virtual machine startup issues on Windows 10 and 11.

Symptoms

You might be experiencing this problem if you notice:

  • "Hypervisor is not running" error when starting a virtual machine
  • Hyper-V Manager cannot connect to the local computer
  • Virtual machines fail to start with "could not initialize" error
  • Hyper-V feature not available in Windows Features
  • Virtual Machine Management service fails to start
  • VM starts but immediately enters "Off" state or crashes

Common Causes

  • Virtualization (VT-x/AMD-V) not enabled in BIOS/UEFI
  • Hyper-V feature not fully installed or Windows Home edition
  • Conflicting virtualization software (VMware, VirtualBox)
  • Secure Boot or Device Guard interfering with Hyper-V
  • Windows Hypervisor Platform not enabled alongside Hyper-V
  • Corrupted Hyper-V configuration or virtual switch setup

Solutions

Solution 1: Enable Virtualization and Hyper-V

  1. 1First, verify CPU supports virtualization:
  2. 2Open Task Manager → Performance → CPU → check "Virtualization: Enabled"
  3. 3If Disabled, enter BIOS/UEFI and enable VT-x (Intel) or SVM (AMD)
  4. 4Then enable Hyper-V in Windows:
  5. 5Win+R → optionalfeatures.exe
  6. 6Check "Hyper-V" (including Hyper-V Management Tools and Hyper-V Platform)
  7. 7Also check "Windows Hypervisor Platform"
  8. 8Click OK and restart when prompted

Solution 2: Fix Hypervisor Launch

  1. 1Open Command Prompt as Administrator
  2. 2Ensure the hypervisor is set to auto-launch:
  3. 3bcdedit /set hypervisorlaunchtype auto
  4. 4Restart the computer
  5. 5If still failing, check for conflicts:
  6. 6bcdedit /enum | findstr -i hypervisorlaunchtype
  7. 7Should show "Auto" — if "Off", a conflicting app disabled it
  8. 8Common conflicts: VMware Workstation, VirtualBox, Windows Sandbox
  9. 9If using VMware or VirtualBox, they may need Hyper-V compatibility mode

Solution 3: Repair Hyper-V Installation

  1. 1Open PowerShell as Administrator
  2. 2Reinstall Hyper-V components:
  3. 3Disable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
  4. 4Restart the computer
  5. 5Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
  6. 6Restart again
  7. 7Verify the Virtual Machine Management service:
  8. 8Get-Service vmms | Format-List Name, Status, StartType
  9. 9If stopped: Start-Service vmms
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