If the reset wiped the EFI System Partition (ESP), you must reinstall the bootloader.
Attempting an EFI-level reset via downloaded software carries significant risk. If the software is interrupted during a deep system reset, the camera may become completely unresponsive. For non-critical issues, it is recommended to first try the built-in Factory Reset reset eos efi software download
: A utility to use your camera as a high-quality webcam, though users have occasionally reported software conflicts on systems with older background modifications. How to Perform a Standard Reset If the reset wiped the EFI System Partition
: Recent security advisories (e.g., CVE-2025-15467) emphasize keeping your camera firmware updated to prevent vulnerabilities. reset eos efi software download