When I plug the arduino into the USB port it lists COM4, COM5, COM6 and COM7 with COM4 being the one that is connecting. When I unplug the USB, it lists COM5, COM6 and COM7 whether the device is connected to the board or not. Uploading produces an error messages for each port.
Sketch uses 5146 bytes (15%) of program storage space. Maximum is 32256 bytes.
Global variables use 348 bytes (16%) of dynamic memory, leaving 1700 bytes for local variables. Maximum is 2048 bytes.
C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude -CC:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf -v -patmega328p -carduino -PCOM6 -b115200 -D -Uflash:w:C:\Users\Ross\AppData\Local\Temp\arduino_build_784367/RC_complete_1.ino.hex:i
avrdude: Version 6.3, compiled on Jan 17 2017 at 12:00:53
Copyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/
Copyright (c) 2007-2014 Joerg Wunsch
System wide configuration file is "C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf"
Using Port : COM6
Using Programmer : arduino
Overriding Baud Rate : 115200
avrdude: ser_open(): can't open device "\\.\COM6": The semaphore timeout period has expired.
avrdude done. Thank you.
Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.
Invalid library found in C:\Program Files (x86)\Arduino\libraries\Smart-Robot-Car-Arduino-master: C:\Program Files (x86)\Arduino\libraries\Smart-Robot-Car-Arduino-master
Invalid library found in C:\Users\Ross\Documents\Arduino\libraries\Circuit_0101: C:\Users\Ross\Documents\Arduino\libraries\Circuit_0101
Invalid library found in C:\Program Files (x86)\Arduino\libraries\Smart-Robot-Car-Arduino-master: C:\Program Files (x86)\Arduino\libraries\Smart-Robot-Car-Arduino-master
Invalid library found in C:\Users\Ross\Documents\Arduino\libraries\Circuit_0101: C:\Users\Ross\Documents\Arduino\libraries\Circuit_0101
Error opening serial port 'COM6'. (Port busy)