I am using a USB-8486 with a custom LabView program. At random times in the execution, the 8486 uninstalls itself. This is happening on two different computers and three different 8486's. A software reset or a computer reboot doesn't fix it. It worked right for quite a while, and now has begun to fail. I'm using NI Communications Manager 4.1.1. When the 8486 drops out, the CM says that the interface was removed.