Hello and thanks for your help.
Recently I had to do some repair work on my Pavilion notebook's copy of Windows 7. After making an iso copy and reinstalling the software I used the product key in the OS already, and when I tried to activate the software I got the following message:
"The product key you have entered appears to be a default product key and cannot be used for activation. Type a different Windows 7 home product key."
The Microsoft proof of authenticity is still on the bottom of the notebook, but there are no numbers or a product key visible any more on it. I need the notebook, and I need a product key, where can I find one other than to purchase a new copy, which is unfair IMO, this product key was the one that was on the copy of Windows 7 that shipped with the PC.