What could be causing my car to require multiple attempts to crank, and now not crank at all, even though the lights, radio, and windows are functioning properly?

Possible causes of a car requiring multiple attempts to crank or not cranking at all, even though the lights, radio, and windows are functioning properly, are: Weak Battery - If the battery is weak or dead, it may not have enough power to turn over the engine. This could also be due to a faulty alternator that's not charging the battery. Faulty Starter Motor - A faulty starter motor may not be engaging with the engine properly, preventing it from starting. Ignition Switch Issues - Problems with the ignition switch, such as a worn or damaged switch, could prevent the car from starting. Fuel System Problems - Fuel system problems such as a clogged fuel filter, bad fuel pump, or fuel injectors could cause the car to have difficulty starting or not start at all. Malfunctioning Engine Control Module (ECM) - The ECM controls the engine's performance, and if it's malfunctioning, it could prevent the car from starting.