Problem uploading a very basic led program to the UNO board.

Arduino: 1.6.10 (Windows 10), Board: "Arduino/Genuino Uno"

Sketch uses 724 bytes (2%) of program storage space. Maximum is 32,256 bytes.
Global variables use 9 bytes (0%) of dynamic memory, leaving 2,039 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 for suggestions.[/u]

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

sketch_dec27a.ino (230 Bytes)

Select right port in "Tools" -> "Port".
Your device is not on COM1 for sure.