1) Check that the USB port is working. If you have something else, such as plugging your phone charger in just to verify it works. (yup, been there, confused me as to why, but it was a bad port)
2) Check your cable. If your dog or cat, or even your two y/o like to chew things, ya, ...
3) Look inside the ends of the USB cable for any paper or something. Low probability, but it only takes a couple seconds.
4) If possible, try another cable. We have several laying around the house from older EOS cameras AND, I believe it is the Nintendo Playstation uses the same USB connectors.
5) Try to D/L to another computer.
6) And the first thing to try is booting your computer and camera.
Good luck.
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My main computers use Windows 8.1 and 10. I never use the Canon software, preferring Windows Photo Viewer and Paint.Net for light editing. I found the Canon software slow to load, clunky, and limited.
Turn your camera off and plug the USB into the computer and camera. Turn on your camera. Open Windows File Manager; it usually shows up as a file folder icon. On the left side is a list of libraries and a tree going to "THIS PC" or it might say "My Computer". Look for Canon EOS and click through that. I use that to d/l straight to a folder and work from the folder.
