Can I upgrade Windows 7 to Windows 8?

Hello everyone: first, I may not be in the right forum but I could not find one to deal with my issue. If you can help me here, great. But, after reading my comments and you decide that's there a proper forum please advise me how to navigate to it so that I can re-place my comments there.

I own a DELL INSPIRON 3647, running Windows 8.1, and it's on a rolling cart. Whenever I want to use it, I got to roll it out, plug it in and go at it. Sometimes it's just to check a website and when I'm through I gotta put it away. To get around that I've purchased several small laptops but I'm far from being pleased for various reasons.

Today I bought a DELL LATITUDE E6430 but it's loaded with Windows 7. For my needs I could possibly live with it as it is. But I'd rather upgrade it to 8.1. I could go to YouTube and select one of the many videos showing how to do it.

But if it's possible, I'd prefer to use the Operating System disks that DELL sent me with the purchase (from them) of the INSPIRON. So my question to the members is: Can I use the INSPIRON disks to upgrade the LATITUDE?

Let me hear pros and cons and any hints, tips, suggestions, etc., you may have which I will appreciate.