I have been using the beta version for about a year and now need to buy the product key. I go online and there are a lot of product keys out there and some even free. I am very confused about what to buy and where & if I can use it on all three of my computers. Or can I even use a purchased product key on my beta version or do I need to purchase the whole Office 2010 Professional for Home ande Office. A lot of these sites seem like a scam. Can anyone direct me to someone I can ask these questions without having to pay 49.00 for just asking? Thanks so much for any suggestions.