[emil.sekula]

Hello,

Today I have recognized that autoexec.bat file is missed on my computer. How is possible ? Is it necessary to have it ?

Regards,

[leroys1000]

The autoexec.bat file was used to load low level drivers and programs
in DOS.
XP does not have DOS,so it isn't used.

[Jage_b]

Well it could be hidden, too. Go to tools->folder options->view tab->check show hidden files and folders. It should be there now.

But yeah, don't panic it's not, if you're looking for it while you're running Windows then there's no reason to worry because Windows is still running properly. Also, I think if you delete it then windows will just make a new one during startup, but don't take my word for it. :-P

[emil.sekula]

OK. Thank you guys.

[TheOutcaste]

NT based versions of Windows don't use it, nor do they use config.sys.

They do use autoexec.nt and config.nt (located in Windows\system32) to setup certain parameters that may be needed by old DOS programs.
You can read the REM statements in the files for more info.

From autoexec.nt:

REM AUTOEXEC.BAT is not used to initialize the MS-DOS environment.
REM AUTOEXEC.NT is used to initialize the MS-DOS environment unless a
REM different startup file is specified in an application's PIF.