I am attempting to install Microsoft 2007 on to my new Windows 7 Laptop, I have managed to locate my Office disk (with cert of authenticity on it) but it does not contain my 25 character product key. I have gone on to office on my Vista laptop and pulled from the registry the product id but this contains characters that are invalid in the character key and is only 24 characters long. I am stumped as to what to do, the email account office is registered to is an old university one that is now defunct too. Can anyone help me?