I have an Acer Aspire 4520 with Vista Home and my sd card reader has stopped working. I am using the same 2gb card that I have always used. I have gone into the device manager under sd host adapters and tried updating the driver and it says that I have the best driver and that it is working properly. I have also tried to uninstall it and re-installed it and still nothing. Can anyone offer me any more ideas?