I have found a very good price for an English International Windows 10 Home, supposadly KW9-00017. However, the seller seems to be under the impression that it might be OEM/OEI which is why it is about €40 cheaper than usual. What specific questions can I ask him to determine if it is a proper, transferable retail version of the English Int. OS or some one shot OEM/OEI? Is the packaging gatefold(docs, USB, key code etc) for the retail and a grubby envelope for the OEM/I version? If it has KW9-00017 on the box does that pin it down as a retail English International transferable copy? The ad also states that it is a USB copy, if that helps at all, and the photo is of a generic gatefold W10 Home box. Some other info, and this might pin it down, the only code showing on the advert is this: x19-92030-03. Can anyone decipher it and determine exactly what language and type of W10 Home it is? Any ideas? Tom.