Sorry about that! My computer is Windows 7. I normally transfer pictures through a HDMI cord with the camera being set on PTP. The other day I pluged the camera into my computer, like I normally do, and turned the camera on and my computer totally shut down. I had to restart and when I did the computer would not read the camera. It will read other devices, but not the camera. So, I don't know what happened. I have not tried a card reader and I may be forced to get one. I thought I'd try to troubleshoot this and see if anyone else had experienced this problem. Thanks for your help, Ken!!