Windows 10: New Mobo/CPU, used prior product key but can't activate

The lifespan of my prior mobo had unfortunately come to an end so I've had to switch hardware to a new mobo and CPU. I had originally bought a copy of Win8 in 2014 and upgraded to Win10 for free when it was offered. Before switching hardware I copied the product key into a text document and then replaced components. Using Win10 boot media I reinstalled on the new hardware and new SSD. Windows is not recognizing my product key now however. I purchased this copy and would very much like to use it.

:)

 

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.

 

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.

 

Windows 10 activation key using windows 7 key

Do you happen to know if your Windows 7 is an OEM or a retail version? For more information, check this answer of Andre Da Costa in this
thread.

For you to know the Windows key, follow the steps below:

• On the Start menu, type Command Prompt.
• Right click it, and Run as administrator.
• Enter the following command:wmic path SoftwareLicensingService get OA3xOriginalProductKey
  
• Hit enter and the product key will be revealed, copy the product key.

Follow steps below to enter the produce key:

• Click Start.
• Click Settings.
• Click Update & security.Activation.
• Click the Change product key.
• Then enter the new product key then click Next to Activate.

Get back to us if you need further assistance.