If you do not have the original software installed, the updater will normally fail. Use the following to trick the installer into performing a full installation:
is a dedicated software application used to bridge the gap between Canon EOS digital cameras and computers. While newer cameras often use EOS Utility 3, many classic EOS models—such as the Rebel T3i, 60D, and older 5D series—require version 2 for seamless file transfers and remote camera control. How to Download Canon EOS Utility 2 canon eos utility 2 download
: Search for your specific camera (e.g., EOS 70D or Rebel T5). Choose Your OS If you do not have the original software