Problem while booting
Please tell us more about it: what else did happen, were you able to login and run the live cd? Did booting succeed or fail? at what point?
Try disabling the USB ports and see if booting will go straight. Latest Ubuntu uses an updated kernel and mostly should have no problem with usb. I've tried ubuntu 8.04 to run over my old multi-brand-china.parts-assembled laptop with four usb port and it did boot without issues.