Why? Because malware authors know people search for these files. They package ransomware or keyloggers inside a file named update.bin . Furthermore, a file from an unofficial source may be for the Blaupunkt Key Largo (a different variant) which will permanently corrupt your unit’s bootloader.
Once you have downloaded the correct update file (usually a .zip or specific firmware file), follow these steps: Blaupunkt Key Largo 970 Software Update File Download