Do not download firmware from third-party file-sharing sites. They may contain malware or corrupted files.
Access via console (baud 9600) or SSH/telnet (if enabled): hp j8013e firmware
Updating the J8013E can be accomplished through several official channels, though the recommended path often depends on the host printer model. J8011E Jetdirect Firmware Update - HP Support Community Do not download firmware from third-party file-sharing sites