1. One such instruction in the article is this: "Check the Config.nt and Autoexec.nt files in the SystemRoot%\System32 folder for non-standard settings."

Question: How does one know or learn what the standard settings are?

2. A 2nd. instruction reads: "Use a REM statement to remark out all entries except the following default entries."

Question: How, exactly, do I use a REM statement to remark out entries?