#Oracle vm virtualbox windows 11 how to#
#Oracle vm virtualbox windows 11 windows 10#

Open the Windows security app (Search for security & open Windows defender security).

Even though we uninstalled the Hyper-V feature completely from the PC, the VirtualBox VMs could work very slowly if the core isolation option is still active. It is one of the virtualization-based security options that use the VT-x of the Windows computer. 3) Disable the Core isolation option in Windows Defenderīefore disabling the device or credential guard in Windows defender, disable the Core isolation. Also, the core isolation option in Windows 11 security. If none of the above steps helps you, the final option is about the device and credential guard in Windows Defender.

Because the new VM also started with the green turtle icon. The process was painfully slow, and I could not continue further.

#Oracle vm virtualbox windows 11 windows 10#

To verify whether this is affecting only the existing virtual machines, I created a new virtual machine and started installing Windows 10 on it. Still, the virtual machines in VirtualBox worked exceptionally slow. The above commands returned a successful message at the end. Technically, this step did not help me either. Then switch on the computer to see the difference. Shut down the computer after the above commands and wait for 20 seconds. DISM /Online /Disable-Feature:Microsoft-Hyper-V bcdedit /set hypervisorlaunchtype offĪnd DISM command to remove the feature. Open the command prompt as administrator and execute the following commands. Several feedbacks are available online to perform a clean removal of Hyper-V features from the command prompt. 2) Clean Uninstallation of Hyper-V by Command Prompt So, in the control panel, I did not see these options selected, yet the VMs worked very slowly in VirtualBox. I did not enable Hyper-V or any extra services. In my example, it was a fresh installation of Windows 11 on brand new hardware. If this doesn’t help, go to the next step. Once the computer is rebooted, power on the virtual machines in VirtualBox and see whether they work at the normal speed, also, the green turtle icon should not appear in the VM console. You need to restart the computer to take effect. Make sure to untick Hyper-V services, Virtual Machine Platform, Hypervisor Platform and Windows Sandbox. Click on the ‘Turn Windows features on or off’ option to remove the Hyper-V and related features. Visit Control Panel -> Programs and Features. Make sure to find the correct one and remove them. Windows 11 and Windows 10 have slightly different names for these features. Microsoft services like Hyper-V always access the VT-x technology first while the host OS boots up hence, VirtualBox can’t access them later. These features and VirtualBox can’t work together well on a computer. If you installed Hyper-V, Sandbox, Docker features or anything related to Hyper-V recently, you need to uninstall them.

#Oracle vm virtualbox windows 11 how to#

How to Fix Extremely Slow VirtualBox VMs – Windows 11/10 Host 1) Uninstall the Hyper-V feature We discussed a similar problem earlier here. Hyper-V and VirtualBox can’t access the VT-x (Virtualization technology) simultaneously on a computer. When the Windows services occupy this feature, VirtualBox can’t use it. VT-x is a critical feature the VirtualBox uses to run the VMs at optimal speed. The Microsoft Hyper-V feature or related services using virtualization technology (VT-x) on your computer.

Reason for the Slow VirtualBox VMs in Windows 11 This indicates that there is a performance issue for the VM.

You will notice a green turtle icon on the virtual machine console.

Sometimes you will not get the desktop screen even after 10 minutes.

Obviously, the VM boot will be too slow.

How to Identify that the VM is struggling to work on Windows 11 Host? Follow the below steps to fix it and make it work like usual. Even if you haven’t installed the Hyper-V feature or already removed it (installed earlier) from the control panel, you may experience extremely slow virtual machines in VirtualBox. The main reason is the Hyper-V feature on the Windows OS.

3) Disable the Core isolation option in Windows Defender.

2) Clean Uninstallation of Hyper-V by Command Prompt.

How to Fix Extremely Slow VirtualBox VMs – Windows 11/10 Host.

Reason for the Slow VirtualBox VMs in Windows 11.

How to Identify that the VM is struggling to work on Windows 11 Host?.

Why VMs Working too Slow on VirtualBox with Windows 11?.