Have you tried changing the COM port to another one? You can do this on the Device Manager, right click on USB Serial Port>Properties>Port Settings>Advanced>COM Port Number, then select one that is not currently in use. Let me know if it helps.
Hi JPMontero_Intel, thank you for your answer.
I have already tried to change the COM port, but I have always an Access Denied
Have you been able to interact with your board from Serial Terminal?
What kind of FTDI cable are you using? Is for 5V or 3.3V?
Have you tried to interact with the board using Putty or another Terminal simulator?