Sorry about the MSI intrusion but the msi-microstar group is not responding. There is only 5 or 10 posts a week. That is not good. Any help that you can give will be greatly appreciated. KM2M Combo - Athlon 1000 - Maxtor D740X-6L 20G - 256 PC133 - Teac 532E - PS=PC100 145W - Zoom PCI Voice Fax Modem - Integrated S3 ProSavage DDR video - MS Track Ball Optical USB Mouse - Samtron 77V Monitor - Bios updated to Ver 3.54.000 - 98SE-2/04 updates. When I add a Canon MP730 - USB to the system it freezes up on start. Tried - changing cmos - usb hub . Turn off MP730, computer starts normal, then start MP730 and everything works normal. Also the MP730 runs normal on Abit system. Also have another KM2M Combo in a much newer case/300W PS - PC2700 - 2400+ - The MP730 has the same problem with freeze on start. No help from MSI support. Someone was saying that the MP730 has its own memory card and the computer is seeing the MP as a usb external drive and trying to boot to it. I tried alot of different configurations and none worked. Warren