Boot to the DOS prompt (F8) and...c:\>edit autoexec.bat
Every line in that file will be executed when the computer boots as if it were being type from you computer. Windows 98SE deos not need that file unless you have some old legacy devices or drivers. It doesn't need the config.sys file either. You could try renaming with...
c:\>ren autoexec.bat autoexec.dux
...Trying windows and renaming them back if there is a problem. Larry