I have a USB microscope that has stopped working,the computer doesnt seem to recognise it and it isnt loading the driver when I plug it in? It usually shows the driver loading details on the bottom right of the screen. Ive got a quad cpu, win 7,8 gb ram and 6 x 2.0 and 2 x 3.0 USB ports. Ive tried everything I can think of to get this working again. Any ideas?