I have to ask but why is it that you think an Intel nic will not work under Windows?
Linux might support more [generic, and older] nics than Windows, but that's like saying a junk yard has more variety than a new car dealership. It's true (to that exact extent), but most people want h/w that is supported 100% of the way, as opposed to some flaky 15%.
Windows is usually the primary market for just about all the hardware out there, except for the very fringe stuff, or the extremely specialized gear.