|I might not have properly understood your question. However this is how you can edit autoexec.bat without Windows if that's what you want to do:|
Tap F8 while booting and select one of the command prompts.
From the C prompt type edit autoexec.bat and hit Enter key.
If your mouse doesn't work in this mode you can use (from my dubious memory LOL)
Alt key and the menus at the top of the screen. Whatever, you can definitely edit using the keyboard if you play around. The menus show their keyboard letters underlined.
I'm not sure whether you are wishing to run in DOS or Windows. Autoexec.bat is not required in Windows and can be disabled by renaming it (eg. to Autoexec.old). Sometimes it can contain bad information that impairs operating properly in Windows. The command from the C prompt would be ren autoexec.bat autoexec.old
Note that you would then be unable to use games which are for pure DOS only.
If the above is no help then pop back and fully explain what you are wanting to do.
Always pop back and let us know the outcome - thanks