I have been given a Vostro 1540 laptop by a friend to have a look at. It has recently stopped the use of all usb functions. I go in to the Device Manager and everything looks good, no errors. I delete them all and restart the machine. Again all looks fine but nothing works.
I plug in a usb key and although the light comes on nothing shows on the machine. I have also tried plugging in a mouse. When I do so the red light beneath flickers of for a second and then again, nothing.
The USB ports did work and I know this as I did some work on the laptop before Xmas and there was no issue then.
Any ideas would be great.
BTW - All W7 updates are up to date