Having Problems Resetting Windows 10

Hi everybody, I hope you guys can shed some light on this. I upgraded to Windows 10 the day it came out, and I've been almost problem free. I did not do a clean install, I just upgraded. But recently, I was going to reset my laptop, and I can't. Here's what happens: I go to settings to reset it, I click reset and nothing happens. The mouse will have the blue loading wheel for a couple of seconds, and that's it. I try again, still the same thing. I know you can reset in advanced startup, but I was just wanting to know why this is happening, and get a solution. I have also restarted my computer, so that's out of the question. It probably sounds like a stupid question, but I was just wondering why it is doing this.

So, if I was to download the Media Creation Tool, I could do a clean install, and I won't need a product key?

Okay. Thank you for your help.

Although doing a clean install is a very good alternative to resetting, I'm still scratching my head on why the "Reset this PC" button won't open.