What files are needed to boot a computer?

Updated: 04/26/2017 by Computer Hope

MS-DOSThe computer needs the minimum of the below three files to boot to an MS-DOS prompt.

command.com
io.sys
msdos.sys

Note: The above files are the absolute minimum. If an external command such as fdisk needs to be performed, that file also needs to be copied to the disk or drive.

Note: Other operating systems may use different files to boot into their operating system. These files are only for computers booting into MS-DOS.