I get device descriptor request error all time when I plug Arduino Uno r3 in my windows 10 desktop. Earlier, the Uno appeared under the other devices list in device manager, but now It appears under the Universal serial Bus menu. I did all things like uninstalling the Arduino Uno, restarting the pc, installing usb oblivion, etc. But every time it comes device descriptor request failed
What is "usb oblivion"?
Can you identify tyhe chip closest to the USB connector; 'circled' in red in below image.
It's probably not the 16U2, most likely a CH340 and maybe a FT232x or PL23xx or CP21xx. For the CH340, CP21xx and PL23xx you will need to install the drivers; as there are no official Arduino boards with these chips, you will have download them.
- CH340: http://www.wch-ic.com/downloads/CH341SER_ZIP.html
- CP21xx or PL23xx: not sure; you will have to a search.
Just in case, if the chip is a FT232x, VCP Drivers - FTDI
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