We have a system with an Intel i7 CPU. We are able to connect to it with RealVNC using AMT and we are able to enter the BIOS with the F2 or DEL key (I forget which key). That works. As soon as POST finished keyboard and mouse do not work. For example when I PXE boot (pxeboot.com) it tells me to press F12 to PXE boot but F12 does not work. Or if I do PXE boot (pxeboot.n12) and boot the Windows 7 installation media (boot.wim) the mouse and keyboard do not work do I can proceed with the install once the installation CD boots up.