I am getting the above mentioned error "Unknown USB Device (Device Failed Enumeration)" in device manager and some of the USB devices are not detected in the USB 3 port of my DH67BL motherboard. I have tried the drivers from Intel website as well tried windows automatic update for drivers. Please help.
You'll need to give us a *lot* more information. What is O/S being used (Windows 7? Windows 8.1? Windows 10? Linux?)? What are the devices being plugged into the USB 3.0 port(s)? What is the system configuration (i.e. What processor? How much Memory, SSDs/HDDs/SSHDs? Any other devices connected? etc.)?