You can try to solve this issue by following methods:
- Use another USB cable.
- Use another USB connect port from your computer.
- Uninstall the USB driver,then download the latest driver from our website and install it
http://www.holux.com/JCore/en/products/products_download.jsp?pno=349 - Check the COM port number from your computer,and set ezTour to detecting the same COM port
Source: holux.com, translation reworked