Function and Purpose of Boot.ini

Boot.ini is one of the very first files that come into play when a Windows XP system is started up. It is a plain text file that is kept in the system root, so it is usually C:\boot.ini. Because it is an essential system file, the attributes are set to hidden, system, read-only to protect it. That means that it will not appear in the file lists in My Computer or Windows Explorer unless the default Windows settings are changed to show hidden files.

Boot.ini contains the location of the Windows XP operating system on the computer. If there is a multi-boot system, the locations of of any other operating systems are also contained. During the startup process, functions from the Windows XP file named "Ntldr" are in charge of getting the proper operating system loaded and Ntldr looks at boot.ini to find out where the operating systems are located and whether a menu should be displayed. Boot.ini can also include entries giving boot options such as Safe Mode or the Recovery Console.

Click here for the tutorial that will guide you to add, edit or remove an entry from boot.ini .