I was having computer problems and internet was down. I manage to mess up the MBR for windows and ending up having to install Ubuntu to get running again. However, I lost my product key. I purchased Windows 7 pro from digital river about a year ago. The problem is the account was linked to my school email which has been changed to windows live account. They deleted everything in the account so all attempts to recover my key from digital river seems impossible. Is there anyway I can get a key from my product ID? I am willing to pay a fee for this as it beats having to buy pro over again.

The product id is unique per product, not per copy of it, so I doubt that you will be able to use it to get a new product key.