Arduino not uploading the program

I have bought a new Arduino Smd , but none of the programs is being uploaded , the ide shows error Arduino: 1.6.5 (Windows 8.1), Board: "Arduino Uno"

Sketch uses 5,704 bytes (17%) of program storage space. Maximum is 32,256 bytes.

Global variables use 314 bytes (15%) of dynamic memory, leaving 1,734 bytes for local variables. Maximum is 2,048 bytes.

avrdude: ser_open(): can't open device "\.\COM5": The system cannot find the file specified.

Problem uploading to board. See for suggestions.

This report would have more information with "Show verbose output during compilation" enabled in File > Preferences.

install the CH340 driver