Originally Posted by Dauntae
It's actually my fathers registration, Home premium 64 bit
I see I'm guessing its a retail version right ?
Personally I let the man and his family keep the key.
Why you ask ? you won't need him to come back in and fix a mistake you caused by accident.
I've been in a similiar jam like yours twice last year.
However in my case I let the key go and let a good comrad of mine keep it and move on with business.
Now if you have another windows 7 home key 32/64 bit I use it.
Or dig into ebay or newegg.com grab a legit windows 7 professional key and be done with it.
Hell if you do it this way, you'll have the same customer come back eventually with more business and more money to hand over.