Funduino uno not uploading to board?

i've bought funduino uno , can't find anywhere ask for them i'm on here
trying use adafruit tutorial motor running when try , upload program board error message

quote

arduino: 1.6.3 (windows 8.1), board: "arduino uno"

sketch uses 2,910 bytes (9%) of program storage space. maximum 32,256 bytes.

global variables use 206 bytes (10%) of dynamic memory, leaving 1,842 bytes local variables. maximum 2,048 bytes.

avrdude: ser_open(): can't open device "\\.\com3": system cannot find file specified.




problem uploading board.  see http://www.arduino.cc/en/guide/troubleshooting#upload suggestions.

  report have more information with
  "show verbose output during compilation"
  enabled in file > preferences.

does know how fix this? had quick google no luck. it's uni project i'm getting stressed , don't have enough time sit , figure out myself.

it seems might not have correct drivers installed or did not select correct port inside ide. have in device manager see if device recognized.

with device plugged in, under "ports com , lpt" if has been  assigned comport. if not have @ ic closest boards usb port let me know written on it.

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