![]() ![]() And if it detects a problem, you will see an error screen or beeping sounds, indicating there is something wrong with your system. If everything is fine, your system starts as usual. The process is called Power-On Self Test, or POST. When you turn on your PC, BIOS goes through a process to determine if the attached devices are in the proper place and running properly. It is stored on a memory chip that retains data when you turn off the system. ![]() ![]() The system manages the data flow between the OS and attached devices like mouse, hard drive, printer, keyboard, video adapter, etc. It controls the booting of your system and acts as a catalyst for the functions of your PC. Basic Input/Output System or BIOS, as we know it, is the built-in core processor software. ![]()
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