How do I download Windows 10 onto my computer?

[Toastey]

I know this sounds like a weird question, but I'm really not sure. I already have a product key for Windows 10 Pro (It looks like this: https://http2.mlstatic.com/windows10-pro-licenca-original-selo-holografico-cd-nota-D_NQ_NP_841725-MLB25469262103_032017-F.jpg) but my computer does not a dvd drive. How would I go about actually downloading Window 10 onto my computer?

 

[Calvin7]

Create Windows 10 installation media
https://www.microsoft.com/en-us/software-download/windows10