This article discusses the difference between activating and registering a Microsoft product.
You must activate your Microsoft product to confirm that each copy of the product is not installed on more than the limited number of computers that is indicated in the software end user license agreement (EULA). The activation process can be performed by using the telephone, a modem, or the Internet. None of the information that is collected during activation will be used to personally identify you.
To activate your product over the telephone:
Office activation - visit the following Microsoft web site and choose Activate Office by telephone option
You do not have to register your Microsoft product. However, when you register your product, you can receive support, product update information, and additional benefits. When you register your product, you must submit some personal information.
To register your product and for help with product registration issues, visit the following Microsoft Web sites:
Register your Surface productNote Registration of a Microsoft product does not provide to us your proof of purchase for that product. You should maintain any receipts or records of your purchases of Microsoft products in case you need to obtain replacement media or product keys. For more information about obtaining replacement media or product keys, click the following article number to view the article in the Microsoft Knowledge Base:
326246 How to replace Microsoft software or hardware, order service packs and product upgrades, or replace product manuals