Windows 10: Windows 10 Re-install

I had to reinstall Windows 10 on a Machine. When I used the Windows 10 USB Creation tool in the past it let me choose what version of Windows 10 I was installing Pro or Home On this particular machine it came with Windows 10 Pro, but when I re-installed Windows 10 it installed Pro. I do not have a product key as it was built into the system. All of this had to happen after I tried to update the Bios on this HP machine. How do I get this system back to windows 10 PRO so I can put it on my corporate network?

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windows xp installation and dual core am

could someone please list the steps they follow to install windows with a dual core processor and windows xp service pack to. I'm reletively new to amd dual core and i feel i'm missing a step. All help will be appreciated. thanx

 

Is it time for Windows 10 already?

Here's a good step by step guide on doing a fresh install.

How to clean install Windows 10 from a USB drive - Software - Feature - HEXUS.net

 

Installing Windows 10 on New PC?

I'm going to be building a new PC on Christmas and want to install Windows 10 on it. I have Windows 10 on my current PC, which I installed upgrading from 8.1 with the files on a USB. How do I go about installing a clean copy of Windows 10 on this new PC? I think I recall something about installing it once makes Microsoft recognize your hardware, but since this will be a PC I'm not sure what steps I need to take. Do I need to go 8.1 -> 10 or is there a method of going directly to 10?