I have it working on a Win7 x64 Lenovo Laptop.
There are others issues I have come accress, here is one more.... If the device your PXE booting is a Surface Pro 3 then those need the "Microsoft Ethernet Adapter" in order to PXE boot. I have not gotten any other ethernet adapters to PXE boot on Surface Pro 3. Including Belkin and Startech ethernet adapters.