Briefly explain the boot up process of windows xp

EXE also loads and initializes device drivers and loads services. At this point, the system displays a graphical screen with a status bar that indicates load status. Services are started. EXE and displays the Logon dialog box. You can log on at this time, even if Windows XP Professional might still be initializing network device drivers. No comments:. Newer Post Older Post Home. It first carries out the P.

T that performs and verifies all initial hardware checks, such as checking if the system is initialized by a warm or cold start, detecting the presence of peripheral devices and the amount of memory present. After this, the hardware' firmware will individually carry out its own diagnostic test such as S. The system will now attempt to determine the sequence of devices to load based on the settings stored in the BIOS to start the operating system.

It will start by reading from the first bootup device. If it points to the floppy drive, it then searches for a floppy disk. If it does not detect a bootable diskette in the floppy drive, the system displays an error message. If the floppy drive does not contain a diskette, it bypasses the first bootup device and detects the second device, which is usually the hard disk.

It'll then start by reading the boot code instructions located in the master boot record and copies all execution into the memory when the instructions are validated and no errors are found. Control is then passed on to the partition loader code which accesses the partition table to identify the primary partition, extended partitions and active partition which is needed to determine the file system and locate the operating system loader file - NTLDR.

NTLDR will then switch the processor from real-mode to 32 bit protected mode which memory paging is enabled. NTLDR will call upon the boot. Computer Hardware Explained. The boot process is something that happens every time you turn your computer on.

You press the power button come back a few minutes later and Windows XP, or Windows Vista, or whatever Operating System you use is all loaded. However, what really happens when you press the power button and turn your computer on? This process is called the boot process and this article will help you understand the process of turning on your computer. The following is a list of what typically happens in a pc, but it will differ depending on your bios and manufacturer.

This concludes this article on the boot process that happens to your computer when you press that power button. Were you surprised at how much work the computer has to do when it starts?