When I plug the printer into a USB port on my laptop, the laptop sees a USB device called USB-SERIAL CH340 (COM12). Windows starts installing the driver for it, but the installation eventually fails and Windows reports in the pop up dialog “Device driver software was not successfully installed”.
When I start the 3D Printing software, it cannot connect to the printer on COM12 and fails with an error: Serial Error: could not open port ‘COM12’: WindowsError(2, ‘The system cannot find the file specified.’)
My laptop is running Windows 7 Home Premium 64 bit.
Has anybody else seen this?