USB Oddities - Z87 Extreme4

This board has been working great for over a year and then yesterday the USB ports went completely funky.  If I plug in a USB1 device (keyboard, bluetooth dongle) then it works great.... if I plug in a USB2 or USB3 device, it doesn't show up.  Not in the BIOS or boot options, not in Windows, not in a Live Linx distro.

Any ideas?

I've cleared CMOS values, upgraded the bios, etc.  These thumbdrives and USB devices work on 2 other PCs.

parsec wrote: What OS are you using?

Windows 8.1 when the problem first showed up.  Upgraded to Windows 10 to see if it would solve the problem.

parsec wrote: If Windows, what do you see if anything in Device Manager about your USB ports? If you connect a USB flash drive, does anything change in Device Manager?

  This is with USB3 disabled in the BIOS.  If I enable USB3, I do get another USB3 device that appears.

 Sometimes device manager will display a "Unknown USB Device (Port Reset Failed)" when something is plugged in, but not always -- and never when I have the USB3 enabled. 

parsec wrote: Your board only uses Intel USB ports. Is it any USB port that won't work with the USB flash drives, or only the IO panel, or front panel?

I have tried front panel, IO Panel (both the USB2 and the USB3 ports.)  It doesn't seem to matter.

parsec wrote: Any kind of changes in the PC before you changed the BIOS version? Any recent Windows updates?

No updates or changes until the problem occurred.

parsec wrote: Some USB flash drives have LEDs that flash when the drive is active, or when first connected. Do you see that happening when connected to the PC?

When I plug in a flash drive, it will blink to indicate it has powered up, but it won't blink after that.