Upgrade to windows 10

[FeTrNa]

So I want to upgrade to windows 10, but I have some worries. My notebook has Windows 7 Ultimate which has been very helpful in the last 6 years but since microsoft will end supporting it I guess I have to move on from it. Problem is that I didn't do it in time for the free upgrade and now, even though there are various sites upon one google search that say how to upgrade for free, I'm not sure if I will be able to do it. And the windows 10 pro licence price is way too expensive but I do not want to get a pirated version either. Any and all help will be appreciated. 
Also I was planing on getting new Drives for my machine, so whenever I do this will be on a clean disk, and that too I don't know how it will work out. Should I just buy a product key? Thanks in advance. 

 

I've attached the DxDiag in case anyone needs more intel on my other components.

DxDiag.txt

[kirashi]

30 minutes ago, FeTrNa said:

Should I just buy a product key? Thanks in advance. 

The specs in your DXDiag file are definitely enough to run Windows 10, assuming Dell has proper drivers available for your laptop. I too have heard mixed responses on whether or not the Assistive Updater still works or not, while others have said you can just use your existing Windows 7 key to activate the same version of Windows 10 after installing without a key. Not sure how that works for Windows 7 Ultimate, but you can always buy a license for Windows 10 Home, too. Is there a reason you need Pro?

[LogicalDrm]

-> Moved to Windows

[lloose]

Microsoft is still allowing upgrades. You can do an in-place upgrade using the Windows 10 Media Creation Tool, or a fresh install and just put in the licence code from your Windows 7 Ultimate.