It is time to buy a card reader for your computer.
They can be very inexpensive:
I am using a Canon Powershot G5 for some time and almost a year ago the computer (Windows XP with all its updates) suddenly stopped recognizing the camera when I connect it with a USB cable. I have tried uninstalling canon's software and then reinstalling it, I then bought a USB hub and tried connecting it that way, I have tried other USB cables and all don't seem to work. The only way I can access my photos is to upload them onto another computer and then transfer the photos to a USB thumb drive and then connect that to the computer. Its a very annoying, round about way of getting my photos.
All other devices connected to USB drive work fine - just the Canon has stopped working. My mother has a different Canon camera and I can't access those photos either. I have no card reader connected to my camera.