I have a few cameras I have not been able to install. When I install unified video advantage software. I then plug the camera in when asked to finish install. I recieve a message that there was a problem with the install of the device and it may not function properly. I then uninstall and reinstall the software this time it installed but it has no video and locks up the machine. I have tried different usb ports to see if issue is with usb ports. This is only happening on a few machines, it installs properly on other machines.