Any changes are made by you or an installation of devices or software to your computer. I changed my autoexec.bat to read exactly as you said , but windows won't load. Thanks, Ayexby and asdf. It's a 486 and I don't have a CD drive. Sample is to show you what the file can contain.
Every computer system is different in hardware setup and what it is used for.
You need to customize the file for your own personal needs. You can change these to different numbers to see what works better for you. As far as what order lines should be in. Remember, always make a backup of a system files before you make any changes. Sorry to keep asking all these stupid questions.