What is the function of a bootloader in a computer system?

A bootloader is a crucial component in a computer system that plays a vital role during the startup process. Its primary function is to load the operating system into memory. When a computer is powered on, the bootloader is executed first and is responsible for initializing hardware components and preparing the environment necessary for the operating system to run.

Once the bootloader completes its tasks, it locates the operating system files, usually stored on a disk, and loads them into the system's RAM. This process is essential because the operating system manages hardware resources and provides a user interface for interaction with the computer. Without a bootloader, a computer would not be able to start its operating system autonomously.

In contrast, managing user accounts pertains to the operating system's functionality rather than the bootloader's role. Performing system diagnostics is typically handled by other software tools or utilities once the operating system is running. Similarly, running application software is a task carried out by the operating system after it has been successfully loaded into memory, and is not something the bootloader does.