Whenever I reboot, my computer claims that I need the drivers for three pieces of hardware. The thing is, I have not plugged anything in to the USB's, and the Hardware ID says unidentified hardware. I can tell it that I will fix it later, and everything works fine, but I would really like to know what is going on and eliminate it. I do not use the USB's much, thumb drives, camera download, external memory, and all of these work fine.
This usually happens when the chipset or other internal device drivers are missing. Go to the computer vendor's website and download updated drivers for your computer, install them, including BIOS and Chipset.
I'm guessing you installed Vista over another OS or as a clean setup on your own.