If no USB ports work, try resetting the BIOS (if it's a desktop you can use the CMOS reset jumper or pull out the CMOS battery for 15 seconds or so with the computer unplugged).
If no USB ports work, try resetting the BIOS (if it's a desktop you can use the CMOS reset jumper or pull out the CMOS battery for 15 seconds or so with the computer unplugged).