no connect with COM 3

Development Tools IDE 1.x
1

Please, help me.
i cant connect with the board

vrdude: ser_open(): can't open device "\.\COM3": El sistema no puede encontrar el archivo especificado.

2

Disconnect the Arduino and note the com ports in the IDE. Anything that shows isn't the Arduino.

Connect the Arduino and note the com ports in the IDE. The one that is new is the Arduino.

You can also do it in Windows device manager.