Error upload Arduino IDE Arduino 1.6.5 on Windows 10

I am begining Arduino and I use Arduino Uno on Windows 10.
I uploaded Serial to control led 13 Sketch. And I upload a new sketch again. But The IDE Aruino doesn't upload file.When I opened serial monito, I send '1' and led 13 is on. When I send '0',led 13 is off. I think that Serial Port was being used. Plese help me !!!
My mistake:

Global variables use 9 bytes (0%) of dynamic memory, leaving 2,039 bytes for local variables. Maximum is 2,048 bytes.
avrdude: verification error, first mismatch at byte 0x0000
0x62 != 0x0c
avrdude: verification error; content mismatch