Unfortunately Belarc doesn't give product keys it gives license numbers which are not the same. If you don't fancy delving into the registry (GANDALF <|:-)>'s method), Aida gives product keys click here but you have to have a working system going before it can read the key.
If you've lost the key and don't have the system installed the only way to get going is th plead and beg at Microsoft's door.
leo50, Mr Daniels and Mr Cola are keeping me company tonight so happy pills not needed. Anyway, if I ever do get down I just think of a certain person on a motorbike and I realise....things could be worse.