This happened to my Satellite A665 a week ago, first noticed as intermittent random failure to charge my cell phone (i.e. failure even to put the charging symbol on the battery icon in its status bar), when it did charge from pure power type chargers. After reading the first answer above, I safely removed all USB devices (including the mouse; for the sake of purity, I used the touch pad, which I HATE, until the problem was resolved), used the Device Manager to uninstall both USB root hubs, shut down the computer, removed the power plug and battery, and held down the power button for 30 seconds. With the power cord plugged in and the batter reinstalled, I powered up, and the process of reinstalling the root hubs and their subsidiaries, which took quite a while since the last two driver searches took about 10 minutes. After that, I reinstalled each USB device, starting with a thumb drive, then the mouse receiver, then the cell phone interface (verifying the ability to get Windows Explorer to show the files),...