What is Windows 7 and how is it better than Windows XP?
 

I am not that computer Windows 7 Ultimate savvy, so I do not know Windows 7 Pro Product Key much. I was just wondering what Office Ultimate 2007 Key is and how it is better than Office Enterprise 2007. I managed to download a tool from Microsoft and it said that my computer was compatible for Windows 7. Now, how do I go about getting Office 2010 Activation Key? Is it free to download or do I have to buy it? If so, how much does Microsoft Office Professional Plus cost?