Where to get Windows OS:
````````````````````````

[ Microsoft ]
https://developer.microsoft.com/en-us/windows/downloads/virtual-machines/


[ ebay ]
https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2380057.m570.l1313&_nkw=windows+7&_sacat=0


Where to get Oracle Virtual Box:
```````````````````````````````

https://www.virtualbox.org/

If you already installed it then no need to do it again. Just create a new virtual machine
to install Windows.