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
- 1First, verify CPU supports virtualization:
- 2Open Task Manager → Performance → CPU → check "Virtualization: Enabled"
- 3If Disabled, enter BIOS/UEFI and enable VT-x (Intel) or SVM (AMD)
- 4Then enable Hyper-V in Windows:
- 5Win+R → optionalfeatures.exe
- 6Check "Hyper-V" (including Hyper-V Management Tools and Hyper-V Platform)
- 7Also check "Windows Hypervisor Platform"
- 8Click OK and restart when prompted
Solution 2: Fix Hypervisor Launch
- 1Open Command Prompt as Administrator
- 2Ensure the hypervisor is set to auto-launch:
- 3bcdedit /set hypervisorlaunchtype auto
- 4Restart the computer
- 5If still failing, check for conflicts:
- 6bcdedit /enum | findstr -i hypervisorlaunchtype
- 7Should show "Auto" — if "Off", a conflicting app disabled it
- 8Common conflicts: VMware Workstation, VirtualBox, Windows Sandbox
- 9If using VMware or VirtualBox, they may need Hyper-V compatibility mode
Solution 3: Repair Hyper-V Installation
- 1Open PowerShell as Administrator
- 2Reinstall Hyper-V components:
- 3Disable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
- 4Restart the computer
- 5Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Hyper-V -All
- 6Restart again
- 7Verify the Virtual Machine Management service:
- 8Get-Service vmms | Format-List Name, Status, StartType
- 9If stopped: Start-Service vmms
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