Oracle's VirtualBox virtualization software allows users to run other operating systems inside Windows, providing a seamless experience on PCs with fast CPUs and sufficient RAM.
However, virtual Windows systems can run slowly even on well-equipped computers, often due to interference from Microsoft's Hyper-V virtualization feature on the host machine.
When VirtualBox detects Hyper-V on a PC, it automatically utilizes certain components of this virtualization platform, which can lead to performance issues.
As per Oracle's online help, this feature is described as "experimental," and it may negatively impact performance.
To resolve this issue, users must uninstall Hyper-V, which involves a few straightforward steps.
First, close the virtual machine and exit VirtualBox, then open the Control Panel and navigate to "Programs and Features" in Icon View.
From there, access "Turn Windows features on or off" and uncheck the boxes next to "Hyper-V," "Windows Hypervisor Platform," and "Windows Sandbox."
Confirm by clicking "OK" and allow Windows to remove the relevant components.
Finally, restart your PC to complete the process and resolve the issue.