Usb Ports And Floppy Drive Refuse To Work On A New System

Please i need help from hardware gurus. I just assembled a new system, and everything seems to be working fine except the USB ports and the floppy disc controller. I have gone to setup and enabled both, but if i connect a floppy drive the system does nt recognise it. I have 6 USB ports and none is working. If i connect any USB device it does nt see it and it and the computer displays an error message that the USB has a malfunction. Please what do you think could be the problem?? I need responses from you guys please.