Print all system information, using such software as PCTools or Norton Utilities, every time you make a major change to the system, such as adding cards or changing AUTOEXEC.
To make matters worse, your budget is so tight that you can't even upgrade your old release of DOS (disk operating system), which would have allowed you to insert a PATH command into your AUTOEXEC.
To operate Headroom you need a path command in your AUTOEXEC.
It then overlays several colored shapes onto the opened document, overwrites the AUTOEXEC.
Batch files that you want to run every time you turn on your computer are named AUTOEXEC.
On the next successful boot the worm will try to format the C: and D: drives by creating a new AUTOEXEC.