Amigans consider DH0: ( HD0: on newer machines) as ..
"The Engine Room", So we dont generally stick stuff in there unless its main purpose is smooth running or improvements to the O/s.
Look in one of your working machines Dh0:
open the drives icon.. slesct Show-All files from the menu at the top of the screen. Or use Dos
You will see... (Amongst others)
C: C is a directory NOT a drive. it stands for Commands. Have a guess what lives in there !!
Libs is short for Libraries - See above !!
Devs is Devices (Drives etc)
S .. Now this one is where your auto exec lives. Its called Startup-Sequence. guess what that does !!
hehe
Custom User startups go into S: as well. They are called.... Wait for it....
User-Startup. this is basically a kind of registry. there are pointers to where your programs are installed or alias's.