Windows 10: Will Windows 10 ask for the activation key after doing a Factory Reset?

I've lost a lot of performance recently and before upgrading my pc, I want to factory reset it and hopefully get rid of something that may be causing the loss in performance. But I've been scared to do so since I do not know where or if I even wrote down my Windows activation key. I don't know if I need it but it would not be fun if It was likewise. So my question is, "Will Windows 10 ask for the activation key after doing a Factory Reset?"

:)

 

Windows 10 activation problem after factory reset. Error 0xC004C003





See the windows is activated. And this is the screen which asks the product key. I can only skip this step if I boot from the dvd and select the clean install option.

"slmg /ato" returns Activating Windows core single language edition (a string of numbers and alphabets)
Product activated successfully.

 

Windows 10 activation problem after factory reset. Error 0xC004C003

You have to make sure the Win 8.1 reinstall is reactivated, not just assume because it's a factory reset. See tutorial here: http://www.eightforums.com/tutorials...-8-online.html and use the options and activation means appropriate to your particular version and license. There are command line methods (which NavyLCDR is well versed in) that you can also use to get an exact picture of activation, license type, and exact Win8.1 version that will confirm activation before you proceed to the WIn10 upgrade (and that is confirmed to match your exact Win 8.1 version).

 

Windows 10 activation problem after factory reset. Error 0xC004C003


Hi guys.
I ran into a problem here. I have a slow internet connection. Somehow it upgraded from the pre-installed 8.1 to windows 10 via the media creation tool. I used the upgrade this machine now option.
Due to some problem I had to get the track pad and the keyboard of the notebook replaced. After that I did a factory reset using the HP Recovery Manager. After coming back to 8.1 i was not able to upgrade via the media creation tool again it just vanished after downloading. The Microsoft Support guy told me it must be due to a bad connection. So I got the .iso from a friend and installed it, I formatted the partition after installing. The upgrade option required a product key I was able to skip that step only in the clean install option. Then I got the key using show key plus and did a factory reset again and used the upgrade option. But it wouldn't activate. Then I did a factory reset again back to 8.1 and used the disk to do a clean install. I skipped the key part but the key its showing is the same one I get from show key plus. Still its not activating.
Where did I go wrong?