Board at COM1 is not available

Using Arduino IDE 1.x
1

the drivers are updates
arduino is plugged in
i can put code on arduino
arduino is under com1
it shows up on the devices

i am using windows 10

error

Arduino: 1.6.3 (Windows 8.1), Board: "Arduino Uno"

Board at COM1 is not available
2

Try following the steps here to change the port that the Arduino connects to as some other program might be trying to use that port.

3

For those with this problem
you can also check what port is selected on de IDE
Tools-->Port:(COMxx("your board")) -->

regards.