2 things come to mind … 1- there’s something wrong with your USB on your PC (windows?), either in software installed or mainboard drivers like chipset, maybe a hardware connector on your mainboards USB is failing due dust, heat, faulty cable, … 2 - the elicenser dongle itself is at fault, and maybe you can still transfer the licenses on to a new one when it works occasionally; they’re not that expensive. Try running VC2 on another computer first? - F