A number of users have been reporting issues recently removing the protective seal on Windows 10 OEM System Builder product key stickers. Unlike retail Windows 10 licenses, which come on a business size card in the box; the OEM Windows 10 System Builder product key is located on the certificate of authenticity sticker on the outside or inside of the package. To prevent theft, a protective seal covers the product key. Similar to a pay as you go phone card, users can utilize a sharp instrument such as a knife, scissor or even a coin to remove protective seal. See below:
Credit: Mi