Too bad that the only suggested solution is to select the right port. Obviously my problem is very different with my config :avrdude: usbdev_open(): did not find any USB device "usb" (0x03eb:0x2104)Maybe a faulty board ? Strange, since I get the informations from the board through the USB connection.
Your problem is caused by holding the Shift key while you click the Upload button. That causes the Arduino IDE to do an "Upload Using Programmer" instead of a standard Upload. Since you don't have an ISP programmer connected, that won't work, thus the error.
Arduino: 1.8.10 (Windows 7), Board: "Arduino/Genuino Uno"Sketch uses 936 bytes (2%) of program storage space. Maximum is 32256 bytes.Global variables use 9 bytes (0%) of dynamic memory, leaving 2039 bytes for local variables. Maximum is 2048 bytes.C:\Program Files\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files\Arduino\hardware\tools\avr/etc/avrdude.conf -v -patmega328p -carduino -PCOM16 -b115200 -D An error occurred while uploading the sketch-Uflash:w:C:\Users\dharani\AppData\Local\Temp\arduino_build_889315/sketch_oct08a.ino.hex:i avrdude: Version 6.3-20190619 Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/ Copyright (c) 2007-2014 Joerg Wunsch System wide configuration file is "C:\Program Files\Arduino\hardware\tools\avr/etc/avrdude.conf" Using Port : COM16 Using Programmer : arduino Overriding Baud Rate : 115200This report would have more information with"Show verbose output during compilation"option enabled in File -> Preferences.