With the powerful nature of modern day computers, virtualising computers is the most common form of computing.
Type -2 hypervisors such as Hyper-V (Windows 10) and Virtual Box are two free hypervisors that are available. Windows 10 Professional and abov allow you to install Hyper-V as a Windows feature, while Virtual Box is a free to download and free to use hypervisor.
You can down VirtualBox here
Here is a quick video on how to create virtual machine in VirtualBox