upgrading desktop pc from windows 8.1 to windows 10

I have  a Lenovo Desktop PC.  It's the Lenovo K450e

This is my exact computer that I bought at best buy.
http://www.bestbuy.com/site/lenovo-desktop-8gb-memory-1tb-hard-drive-black/5958014.p?id=1219178692600&skuId=5958014

It came with Windows 8.1 installed on it.

I'm trying to upgrade to windows 10.

I read this upgrade article
http://www.cnet.com/how-to/heres-how-to-upgrade-to-windows-10/

So I downloaded the Windows iso and burned it on a dvd.

On the download page there are various versions you can download so I downloaded these 2 versions.

Windows 10 Home 64-bit (x64)
Windows 10 Pro 64-bit (x64)

I read this article to see what version of windows is installed on my.
But when click on PC info it just says the version my computer is running is Windows 8.1.
It doesn't say Home or Pro on it.
http://windows.microsoft.com/en-us/windows/which-operating-system

Anyone know what the correct version I need to install?
or
 how to check to see if Windows 8.1 that I have on my pc is either Home or Pro?