Usb 2.0 coming up unkown device..whats wrong?

[neild79]

the controller itself is coming up unknown deviceone of my usb 2.0 are coming up unknow device + isnt working. can anyone tell me what is wrong + if i can fix it...thanks

 

[iss]

yo need to be a bit more specific. what is coming up "unknown device"? the usb controller itself or a device you are attaching to it?