Because this tool is over a decade old and distributed via torrents and ad-ridden forums, nearly 70% of available copies are infected. Common payloads:
Hold the "Boot Key" (usually the Center OK button or the Call button). Connect the phone to the PC via USB while holding the key. nokia spd unlocker tool v10exe exclusive
Note: Always check the chipset of your specific device model before attempting to use the tool. Because this tool is over a decade old