I have a compaq presario that I re-formatted and restored using the original cd's. I have a internet USB keyboard model #KU-9978. It will not work. It gives the "found new hardware ; keyboard" message, but when it starts to ask for the driver says "can not install the software because it already exists". A bus plug keyboard works just fine. This USB keyboard works on two other computers (one running ME and a newer compaq running XP, so it can't be a hardware issue.