Hi! _PG_
I'm James, An Independent Advisor, and I will help you with this issue
If Windows 10 came preinstalled with your computer, it's called an OEM license.
For the OEM licenses, these dies as soon as the Motherboard dies, so essentially it is non-transferable.
If that is a Retail License, make sure that you are logged into that PC with your Microsoft Account, follow the steps below:
To find your Windows 10 Product Key
- Open the Start Menu and search for Command Prompt (Run as Administrator)
- Type in the command prompt and press Enter:
wmic path SoftwareLicensingService get OA3xOriginalProductKey.
This will reveal the product key of your Windows.
You can try this quick way to remove everything from your PC and start fresh.
- Open the Start menu.
- Press the Shift key while selecting the Power button > Click Restart.
- On the Choose an option screen, select Troubleshoot > Reset this PC.
- Select Delete all.
If you have an OEM license Windows will stay activated.
If you need more help with this issue, just let me know and I will help you.