I think these OEM disks are the media that is sold through the system builder channel within Microsoft's OEM licensing model. These are intended for small-scal

I think these OEM disks are the media that is sold through the system builder channel within Microsoft's OEM licensing model. These are intended for small-scale mom and pop PC builders who are obligated to provide the technical product support: Microsoft product support will not help you if you have one of these licenses. It used to be that anyone could buy these through resellers such as Newegg. I've never seen them for $25 though.