USB Document Camera ("Thustar 8mp") stopped working

We've have an issue with a USB document camera that has stopped working on our front of house desktop computer (it still works on my laptop). We are a small physical therapy clinic and nobody here is particularly savvy with these issues. We have spent some time looking through previous topics in "support" and followed a few ideas from there and from our web searches. So far we still cannot get it to work. The camera is for use with our Electronic Medical Records (EMR) software so that we can easily capture insurance cards and link them to the EMR. The camera turns on but no longer shows us the card in the EMR viewfinder…just a black screen. This is a new camera and was working until we installed BitDefender. This is the correlation but I am aware that it could just be a coincidence and maybe something else is going on. Any help is appreciated.

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