I don't think he was saying that you particularly said to check the RAM, I think that he was just trying to point out that he thought about that particular component and has crossed it off the "potential problems" list while he was troubleshooting.
This is either going to be a driver issue with the device or the OS itself. If you have all available updates for the OS and are using the latest driver for the product, then perhaps you have a faulty product. What I would do is run the OS in safe mode and uninstall all available Zoom software that you had placed on there prior to plugging the device in. Look for windows updates as well. Then download the latest Zoom driver from their site. Once the latest zoom driver is installed, reboot and plug it in. If your last attempt is attempting with the latest zoom driver and latest OS updates and other updates (take a peek at recommended hardware updates as well) then I would replace the product with another of the same brand or an all together new adapter.