Do you have any records of the purchase?
Please contact Walmart with the credit purcahse and they will give you the serial number.
Can you please rate and accept answers so I am credit in helping you:)
Did you register is at all?
Hello! My name is*****I am a certified computer professional who will assist you with the problem you described.It looks like the previous Expert is not available any more. I can continue assisting you.
To confirm, when you say "serial number", you are referring to a Windows 8 serial number (product key)? If so, do you have a new computer and would like to re-install Windows 8 using the same serial number?
Let me know,
Hello again!I am following up with you to see if you require further assistance. Let me know by sending me a reply below.Thanks,IT Miro