This issue comes and goes on a regular basis. Usually, with-in a few driver releases it is solved on my system. But with the "new" "released when ready" model this has been draging on since cat 12.6. with very little hope of a solution. I say that because I recently followed the suggested "reporting" method, and the reply was "not helpful". The "presumed fault" is MY system, not the new driver. Update bios, check usb drivers, uninstall, re-install, check with manufacturer, possible other software conflicts!!!!!! Seriously. Working fine, stops working with new Cat, my question is what did YOU do differently!