In the Windows operating system, particularly in versions that support Hyper-V, the hypervisorlaunchtype setting is a critical configuration that determines whether the Hyper-V hypervisor is enabled or disabled during the boot process. This setting is essential for users who need to run virtual machines on their Windows systems using Hyper-V.

Understanding HypervisorLaunchType

The hypervisorlaunchtype can be set to the following values:

• Auto: The hypervisor is automatically enabled during the boot process. This is the default setting if Hyper-V is installed.
• Off: The hypervisor is not enabled during boot. This setting is useful if you need to run other virtualization software that conflicts with Hyper-V, such as VMware Workstation or VirtualBox.

How to Configure HypervisorLaunchType

To configure the hypervisorlaunchtype, you will use the Boot Configuration Data (BCD) store, which is a firmware-independent database for boot-time configuration data. The bcdedit command-line tool is used to modify the BCD settings.

Examples:

1. Enable HypervisorLaunchType:

   To set the hypervisor to launch automatically, open Command Prompt as an administrator and execute the following command:

   bcdedit /set hypervisorlaunchtype auto

   This command sets the hypervisor to start automatically with Windows.

2. Disable HypervisorLaunchType:

   If you need to disable the hypervisor, use the following command:

   bcdedit /set hypervisorlaunchtype off

   This command prevents the hypervisor from starting, allowing other virtualization software to run.

3. Verify Current HypervisorLaunchType Setting:

   To check the current setting of hypervisorlaunchtype, execute:

   bcdedit

   Look for the hypervisorlaunchtype entry in the output. It will indicate whether it is set to Auto or Off.

Considerations:

• Changing the hypervisorlaunchtype requires a system reboot to take effect.
• Ensure that your system's hardware supports virtualization and that it is enabled in the BIOS/UEFI settings.