I am receiving an error for "etLib2.Lib Initial Fail " when trying to control my Dino-Lite USB Microscope from DOS. The error occurs even launching the samples in the software directory. Thanks for considering my issue.
I've looked on the developer's page for information related to troubleshooting or something related, but there was nothing for the issue you're having. I recommend checking the built-in Help section because most of the developers place FAQ sections for the common errors.
Additionally, download the latest version of the software from the official website and replace the installed version.