If your certificate of authenticity is worn out or damaged, you need to contact the manufacturer of your laptop for a replacement product key. New computers that come preinstalled with Windows 7 often have what ised a recovery par.ion. This is used to reinstall the operating system in the event of a .The Certificates of Authenticity COA label is used on the outside of reboxed software and explains what the product is, its country of intended use and country of origin. When viewing packaging, simple things like spelling errors, blurry text and images, or poor print quality can help you identify counterfeit software..That translates to one in every five computers running a counterfeit copy of Windows. It is possible to verify a Certificate of Authenticity COA through Microsoft to ensure that your operating system is genuine. 1. Review Microsoft 's guidelines to iden.y a genuine Certificate of Authenticity. Under optimal cir.stances, do . - The Microsoft Windows Certificate of Authenticity COA label is a label containing a 25-digit alpha-numeric Product Key code and a 14-digit COA code. This label is located on the ch.is of your Dell computer system. Windows 8 computers do not have a Certificate of Authenticity. For more information, see .