POST (Power-On Self-Test)

The Power-On Self-Test (POST) is a process your computer runs automatically when you turn it on. It checks essential hardware components like the memory, storage devices, and the keyboard to ensure they are functioning properly. If everything is okay, the computer proceeds to load the operating system. If there's a problem, POST signals errors through beeps or messages, helping diagnose hardware issues. Essentially, POST acts as a quick diagnostic check to confirm that the core hardware is ready for use before the main software starts.