Canon camera downloading
An update from Mccoyb:
I have to take back some of the previous conclusions about the problem being with the Canon Camera. I based conclusion on the belief that I'd previously had the same problems on a different computer. I think that is now incorrect.
Adding to previous comments above:
I pulled the memory card out of my camera and into an SD CardReader. Plugged the cardreader into the USB port where the camera had been. Again, problems. I switched USB ports. Still, problems reading the card reliably just as the camera had done.
I took the same USB cable to another computer. This time, I could access all data flawlessly on BOTH the cardreader the camera. On this computer, no Canon software had been installed, so I used Microsoft's tool (automatically pops up when camera turned on) to copy the pictures to the hard drive.
I'm starting to think my USB drivers on one computer are somehow completely hosed up. So many different hardware USB ports should not simultaneously start failing. In addition, I tried a THUMB DRIVE and it had very slow performance and problems recognizing the drive letter. However, I tried an external 500 GB hard drive, and the drive letter came up without any problems.
Something may have changed with a Microsoft update that caused USB drivers and/or handling of the USB ports to change. Either that, or there is a virus impacting only the USB ports.
Anyhow, I don't believe it's the camera now or the memory cards.