problem uploading to board

Arduino: 1.8.0 (Windows 7), Board: “Arduino/Genuino Uno”

Sketch uses 5958 bytes (18%) of program storage space. Maximum is 32256 bytes.
Global variables use 864 bytes (42%) of dynamic memory, leaving 1184 bytes for local variables. Maximum is 2048 bytes.

avrdude: ser_open(): can’t open device “\.\COM2”: The system cannot find the file specified.

Problem uploading to board. See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.

This report would have more information with
“Show verbose output during compilation”
option enabled in File → Preferences.

Select the port of your Arduino from the Tools > Port menu.