What are the differences between OEM and Retail editions?
With an OEM edition of Windows there are certain restrictions in the EULA which differentiate it from the full retail version. Firstly, the OEM license is said to be ‘non-transferable’. This means that once the license has been attached to a particular PC, it cannot be moved to another, even if the OS has completely been removed from the first computer. The full retail version is slightly different. With the retail edition you are granted one concurrent license. This means that you can move the OS from one machine to another as long as you remove it from the first machine. It also means that you can change the hardware within the computer without it affecting the license validity. Also, with the retail license you are entitled to free technical support from Microsoft. The OEM edition has support provided by the OEM itself and support may not be complete or free.