Which should be first in the boot sequence?

[skullyman]

Which should be first in the Windows boot sequence?
IO.sys
Config.sys
System.ini
Command.com
Autoexec.bat

 

[AKA]

IO.SYS
MSDOS.SYS
CONFIG.SYS
COMMAND.COM
AUTOEXEC.BAT

 

[agaraffa]

IO.sys
Command.com
Config.sys
Autoexec.bat
System.ini