I've been using card reader for a while now and I was able to delete and copy images from and to the card without any problems, right now when I try to delete them in card reader windows tells me that card is protected (obviously it isn't) can't format in reader. I tried 4 different SD cards, same problem. it's not an external reader. I have a module which displays processor temperature and fan speeds, it's mounted in CD drive bay in my PC. card reader integrated in this thing is connected to USB port inside the case. I'm not sure when it happened first time but I'm pretty sure I never had to install any drivers for this.