Windows 10: Windows reactivation after mobo change

Hello, I had a Windows 10 Pro licence before, but the mobo stopped functioning. I've changed my mobo and also the processor. It wants me to reactivate the Windows but it won't recognize the older key. Is there a way to transfer the key from the malfunctioning mobo to the new one?

:)

 

Changing my MOBO and CPU a

I'm doing PC upgrades and changes entirely for my new mini-itx build.

I'm not sure about how the process would work, but what are the appropriate steps I need to undertake before making my changes?

• My personal data and files are backed up to my Onedrive, and have nothing to lose in terms of data.
• I have an additional copy of Windows 10 (but would prefer not to use it in-case I do another PC build).
• My MOBO and CPU upgrades are polar opposites of my current hardware:
  • OLD HARDWARE
    • Intel i5 6500
    • AsRock Killer MOBO
  • New Hardware
    
  • • AMD Ryzen 7 2700x
    • Asus Strix X-470

This is my first time doing a particular change so guiding steps would be greatly appreciated! Things like how to wipe my hard-drive and reinstall Windows, etc.

 

Changing my MOBO and CPU a

You will have to buy windows license if you change the motherboard, unless you made the computer originally in the first place, or bought a license key.

 

Reactivation Windows 10 Pro issue

I have changed my hardware recently and found that I can't reactivate Windows 10 Pro. In Reactivate Windows section, I can't find my current device in the list, only my old motherboards appeared ( MSI and Gigabyte ). My old hardware are I7-4790 + MSI H81M
Mobo + 8GB DDR3 Ram and I upgraded to I5-9400F + My new Asrock MOBO B350 or 450 something (Can't remember) + 16 GB DDR4 Ram. There is no my current MOBO in the reactivate section, only the old one appeared (MSI H81M Mobo). Pls someone help me.

Also note that I have signed in with my microsoft account that links with Windows 10 pro licence but it only shows the old mobo in the reactivate list.