This process is technical but manageable. You will need a USB drive with a live Linux environment (like the EndeavourOS installation ISO).
Firmware updates are only distributed as .FIR files directly from official Canon support websites. The Risks of "Full Free Reset" Software Downloads reset eos efi software download full
Which exact device/model should I target for the firmware download steps? This process is technical but manageable
Open the EOS EFI software utility. Click to extract the current locked firmware. Click Save to create a backup file named backup.bin . Do not skip this step. Step 4: Apply the Reset Patch The Risks of "Full Free Reset" Software Downloads
: Take out the lens, memory card, and battery.
Before downloading any software, you need the exact model name (e.g., Canon EOS 5D Mark IV, EOS R6, EOS 80D). This is located on the front or bottom of your camera body.