I have a sd card reader for usb that has stopped working all of a sudden. It's not showing up in my computer. I know it works because windows makes the noise to confirm that a usb device has been plugged in. It also shows up in devices & printers. It's just not showing my content in my computer as a drive letter. Can anyone tell me why this is happening? How do I fix this? My sd card reader showing up in devices & printers. Sd card doesn't show up in my computer. If it helps, I'm using Windows 7 Ultimate RTM and the sd card is Sandisk 2gb.