Most of these third-party sellers fool the buyers by selling them the Volume License. Apart from these, there are many third-party vendors too that sell the Microsoft product keys at a much lesser price than the original. If you have gained the product keys from these two methods, you need to worry about the pirated Window 10 license. The Retailer license can be transferred from one device to another however, it can be used only on a single machine. Windows 10 OEM license comes pre-installed on the laptops or desktops and cannot be transferred to other devices, while the Retailer license can be bought from the official Microsoft sources. For Windows 10, Microsoft officially provides two ways to get the license – OEM and Retailer. Microsoft Windows OS is one of the most pirated software in the internet world. Piracy is one of the major problems faced by not only software developers but also consumers.