, an autoloader is a standalone executable file used to forcefully flash or "unbrick" the device's operating system (OS 6) without needing the standard BlackBerry Desktop Software. This process is useful for repairing devices stuck in a reboot loop or showing a "Reload Software" error (Error 507).
Make sure you have the specific autoloader for the 9780. Using a 9700 or 9900 file will fail. Look for OS 6.0 versions, which was the native peak for this model.
Once the command prompt window closes, the phone will reboot. The first boot after an autoloader can take up to 10 minutes. Life After the 2022 Shutdown