vitor_bge

Hi! I have a notebook Toshiba 2450-401. I have a problem with my USB ports. I have connected to this computer an IDE External Case with drive seagate 120 gb 7200 rpm. When I connect this drive or mouse wireless or external keyboard (all USB devices) or printer (together or not with a Hub), it works for a few minutes or hours. Then suddenly all usb devices that I have connected turn off. I will explain better: all my usb devices lost communication with my notebook just for 2 seconds, then all usb devices restart again and i have again access to them just for more minutes ou 1 or 2 hours and then again the same: I lost communication just for 2 seconds...... Please could someone help me? Is this some hardware problem or software? Thanks very much in advance! Best regards, Vitor