How do you reset security system so car will start?

To reset your car's security system, first, make sure all doors are closed and the key is removed from the ignition. Insert the key into the ignition and turn it to the "On" position without starting the engine. Wait for about 10-15 minutes until the security light goes off, then turn the key to the "Off" position and try starting the car again. If issues persist, consult your vehicle’s manual or a professional for assistance.