A: This is usually a driver issue. Try installing the BlackBerry USB Drivers or BlackBerry Link to ensure the computer recognizes the device's bootloader mode.
Assuming you have found a reputable source for the SQC100-1_10.3.3.3216 Autoloader (check the CrackBerry forums or the BerryCloud archive), here is the workflow:
Congratulations. Your SQC100-1 is clinically dead and now resurrected. However, the world has changed.