Hello,
I have a USB-4431 that worked with a Windows 7 computer last week, but this week it has stopped being detected by NI Device Monitor and the power LED does not light. The Windows Device Manager sees the device when it is plugged in and the USB-443 Loader is supposedly working OK. If I check Services, I saw that the NI Device Loader was not started, so I tried manually starting it. However, the NI Device Monitor still does not detect it.
I have tested three different USB-4431 devices with this computer with the same lack of detection. I tested those devices with another computer to make sure that the hardware is working, and they are all OK. I've tried uninstalling the USB-443x Loader and then plugging the device in so that it reinstalled the driver. I tried updating to the latest version of DAQmx. I've tried plugging it into different USB ports and into a USB hub. None of this has made a difference.
There were no Windows updates installed since it worked last week. What else can I try?