I am having issues with these 2 DAQ's working together on the same PC. At first with my old LabVIEW 2011 SP1 PC the USB-6525's we working and everything was fine. Then I Introduced a new USB-6000 to the Mix. It was unrecognized by NI MAX. I then read a few articles and decided to update that PC to the new DAQmx 19.1 which came with the CD for the USB-6000. Now the USB-6000 is recognized and the 2 USB-6525's are not. I have tried the FWUpdate.exe and no devices are recognized by it. Any other suggestions to help bring my 6525's back online?