If you bought MS office product key from retailer, and its stop working or not working, you can simply ask for refund from retailer. A product key bought separate from MS Office setup software, it is high chance to product key is stolen or falsely obtained or it is block for use. Many fake seller in market who sell stolen, unauthorized Microsoft product key. Some of the time these product keys are imprinted on fake label or cards with a download connection to Microsoft software, and some of the time they’re appropriated with software media that is unapproved for resale, for example, limited time media, unique hardware producer re-installation media, or other Microsoft program-particular media.

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