Installing Windows 10 without optical drive

[Weber_]

So I'm building my first computer, and I bought a Windows 10 cd, but don't have an optical drive to instal it. What should I do? Can I put the iso from the cd on a sub drive?

 

[Petrossa]

Use the W10 media creation tool, located here: https://www.microsoft.com/en-gb/software-download/windows10
You can then create an iso from which you can create a bootable USB drive using Rufus.
Make sure to download the correct version of Windows. Keep your bought version handy as you will require the product key.