How come I can't find the com port in the device manager in my computer, I am using usb to serial port. I'm using a usb to serial port.

No driver or the driver is missing, or the usb to rs232 module is damaged. You can see that it's showing up as an unknown driver.Unknown Device

Pull it off and try a different port. If it's still the same, it's more likely that the conversion device is broken. Of course, the driver may also be broken. Try reinstalling the driver first