Despite all the assurances that this product is authentic and can be activated with MICROSOFT ----- IT CANNOT! It loads well enough, but doesn't call for the product code (which is unusual). It will not activate over the internet. Also, it will not activate over the telephone. In fact at this stage, Microsoft referred me to the PIRACY LINE. If there is a special method of loading the operating system or activating the product, such instructions were not included. Consequently, I am seeking a full refund from Amazon or the card company. BEWARE!