Windows 10: After motherboard and CPU change Windows key disappeared?

Hi there after I changed my mainboard and CPU today Windows says that I did not activate windows is there a solution?

:)

 

Windows 10 Pro's license completely glitched out after changing motherboard and CPU

We appreciate your reply. For us to know more about the issue, kindly answer the following questions:

• Did you manage to deactivate Windows 10 Pro first before replacing your motherboard?
• Do you still have the written copy of your product key?
• Are you using the same hard disk where your Windows 10 Pro product key has been activated? If not, where is this hard disk?
• Did you replace your hard disk along with your motherboard and CPU?
• What is the edition of Windows activated on your computer? To know, press Windows + S. Type About, and click it.

Meanwhile, we recommend that you deactivate and uninstall your Windows 10 Pro license from your old motherboard and reinstall it back on your machine using the steps below:

Step 1: Check your your Windows 10 Pro product key using Windows Powershell or Command prompt. Follow the steps below and note down your product key:

• Press Windows key + X.
• Click Command Prompt (admin).
• Enter the following command: wmic path SoftwareLicensingService get OA3xOriginalProductKey
  and press Enter:
• The product key will be revealed, copy the product key.

Step 2: Deactivate and uninstall the Windows 10 Pro Product Key from the old motherboard since it has your license. Follow the steps below:

• To know the Activation ID of your Windows installation. Open a command prompt using the Windows search box and type in
  slmgr.vbs /dlv and press Enter. This will display the detailed license information for the installed operating system.
• A window will open up and will give you details about your Windows licensing and activation status. Look for
  Activation ID and note it down.
• On the same command prompt window, type in slmgr /upk <your Activation ID> and press
  Enter. This uninstalls the product key of the current Windows edition. After a restart, the system will be in an Unlicensed state unless a new product key is installed.

Step 3: Activate your Windows 10 Pro to your machine after uninstalling it due to a hardware change, follow the steps below:

• Open a command prompt using the Windows search box and type in
  slmgr /ipk <Windows Product Key> and press Enter.
• If the key is valid and applicable, the key is installed. If a key is already installed, it is silently replaced. If the key is invalid, an error is returned.
• Open your Control Panel you will see Windows is activated message.

Let us know if you need further assistance.

 

Upgrading Motherboard and CPU

I bought a default Lenovo K450 a few years back that came with Windows 8 preinstalled. Well over the past few months I've upgraded the PSU, GPU, and moved too an SSD without much of a hassle since I was using the same motherboard and CPU. Well, I'm moving
too a whole new upgrade and changing the case, motherboard, CPU, and adding a network card. My question is, once I've changed out all of the parts, will I need to reinstall Windows 8, or can I just install Windows 10 again like normal and follow the steps
with customer support to establish the legitimacy of my previous Windows OS? I have the OEM and Product Key.

 

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.