Permissions and File-Folder-Drive Sharing

Greetings,

The Situation:
I have XP Pro with 3 physical drives C,G,H formatted with NTFS, a home
network, and "Simple File Sharing" Disabled.

What I want to Achieve:
NOT to share (read write,view,list or anything else) the G and H drives
except with Administrators on the local computer.

The Problem:
Drive "Properties" "Share Tab" only allows to temporarily not share the
Drive.....with message,"This share was created for administrative purposes
and will be shared again when reboot.."
Under "Security Tab" when I tick the "deny" permissions for "users" at my
desktop location, Windows seems to go into a fit with "egg timer" coming up
indefinitely (needing to log out to escape).At one time it seemed to 'go
thru' but I was subsequently denied access to the drive even though I am the
"Administrator" and "Owner" with "Full Control" "Allowed" (ticked).
BTW I tried just using "simple file sharing" but this still allows access to
the drives from User accounts.

Questions:

1)Are physical (or logical) drives always shared for "Administrative"
reasons?
2)Can "Permissions" be configured to achieve my Objective? How?
3)If I deny "Permission" to "Users" should that necessarily include
"Administrative" Users as a subset?
4)BTW, What "group" does the group "Everyone" represent ( "the "System",
Administrators etc)?
5)Why does MS make things so hard??

Thanks in Advance

--
Kind Regards,
David