I have a Dell knock-off IBM Model M (from what I have heard these knockoffs were authorised) but for some reason Windows 7 does not see it at all. It is plugged into the PS/2 port and the BIOS is able to use it without issues, but as soon as I am started into Windows it refuses to let me use it. Any ideas of where I can start looking. Does Windows 7 just not use PS/2 devices? If it is any hep, this is a Lenovo M75e (same one I reviewed a while back). I'd love to hear what you guys have to say! Cheers!