I keep getting a pop up message that my windows license is about to expire. I did not think that this was a product with an expiration date, what will happen after that expiration date?

I am using Office Home and Business 2013. I have had numerous occasions where I have previously gotten messages that my product key code was invalid and I checked it the first time and it was keyed correctly. Are these times of messages common and normal or is there really something wrong?

https://neosmart.net/blog/2014/windows-10-embedded-product-key-tool/#more-3188

Designed for users of Windows 7, Windows 8, and Windows 10, our embedded product key tool will retrieve and display the Windows setup product key embedded in the BIOS or EFI, allowing you to store it for safe-keeping or use it to reinstall Windows with an official Windows setup image.

Use the above tool to retreive your product key.

After doing that:

Press Windows key + R

Type: slui.exe 3

Hit Enter

Enter the product key and click Next to activate over the Internet.

Restart your computer