My USB ports suddenly stopped working two days ago.  They still seem to give power, but my computer, running Vista, won't recognize or acknowledge any of them.  The most it will do is offer an error message claiming that something within the device or driver has malfunctioned.
 
As my mouse plugs into a USB port, this makes interacting with the system rather difficult, but I've figured out enough of how to use the keyboard, which isn't USB-connected, that I've been able to navigate through some basic troubleshooting, none of which has helped.
 
I pulled up the BIOS at startup and made sure the USB ports were enabled (I'm not sure what USB legacy means, but that was enabled, too).  I tried running in Safe Mode.  I tried system restoring to last week.  I also, today, tried running the repair on Windows Vista, reinstalling -- I think -- the OS from the hard drive.
 
Any thoughts or suggestions on what to do next?  Could all six of my USB ports (four in back, two in front) have somehow blown?