Windows 10: Windows 10 Pro product key stopped working after changing hardware

I recently built a new pc with completely different parts, and installed windows on it using the product key I have been using for years. But then it told me that the product key is invalid and that I should purchase windows?

:)

 

Home to Pro Key not working


https://support.microsoft.com/en-us/...ng-home-to-pro

Upgrade using a Windows 10 Pro product key To upgrade from Windows 10 Home if you have a Windows 10 product key:

• Select the Start button, then select Settings > Update & security > Activation.
• Select Change product key, and then enter the 25-character Windows 10 Pro product key.
• Select Next to start the upgrade to Windows 10 Pro.

 

Should I buy Windows 10 Home or Pro?

I bought a win 10 pro oem key for £25, changed my motherboard and cpu, and reinstalled windows, and it activated automatically. So I would say why not buy pro?

From here-
Buy Windows 10 Professional license online - Softwaregeeks.co.uk

Was near enough instant delivery of key by email, and it activated on my original install, and on a clean install with changed hardware. Can't say fairer than that for £25

 

Windows 10 Product Key

Hi Oscar,

Since the laptop has no battery compartment wherein the product key is usually located, we recommend that you follow these steps to find your Windows product key:

• Press Windows + X and select Command Prompt (Admin).
• Enter this command: wmic path SoftwareLicensingService get OA3xOriginalProductKey
  and hit Enter.

Also, if you're looking to reinstall Windows 10 after a hardware replacement, we recommend that you follow the steps provided in this

article.

Let us know if performing these steps resolved the issue.