Download the VirtualBox software for your machine from here.

Depending on your system you may need to enable CPU virtualization in your settings.

Click on the VirtualBox Installer to start the installation wizard. Once the wizard is started you can choose which features are installed.

It is highly recommended that you ensure that the network interface options are installed.

On the Ready to Install Screen, hit install to start the installation process. After the installation process is finished, you can tick the checkbox for starting the VM is installed.