A couple of years ago I destroyed my computer running genuine windows 8. ( coffee on the key board will do that) The new insurance supplied replacement came with windows 8 preinstalled so I did not bother to install my original copy (big mistake). Now my dilemma is this: I want to upgrade to Windows 10, having upgraded to 8.1, so I need to retrieve my original key to receive my free upgrade. Or so I understand.........of maybe I just have a bad case of information overload Is this possible? Does Microsoft have a record and if so how can I prove I own a license and how do I make contact with them? If I am successful (not holding my breath} how do I apply it without doing a complete reinstall which will revert to the old 8 version? Any assistance would be most sincerely appreciated