problem uploading to board

Arduino: 1.6.9 Hourly Build 2016/03/17 01:33 (Windows 7), Board: "Arduino/Genuino Uno"

Sketch uses 2,760 bytes (8%) of program storage space. Maximum is 32,256 bytes.
Global variables use 209 bytes (10%) of dynamic memory, leaving 1,839 bytes for local variables. Maximum is 2,048 bytes.
avrdude: ser_open(): can't open device "\.\COM1": 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.

First, why are you using the hourly builds?
Second, does your board require the CH340 driver ?