Ahmen,
The current trend is to have BIOS configurable, and updatable, through
Windows. It's a wonderful thing when building your own system but
troublesome doing what you're trying to do. I've disabled my paralled port
in BIOS but plug a printer into it and it starts talking.
Where I'm employed we've installed locks on the computers to prevent theft
of the internal items, and the computers themselves, but the case needs to
be designed to accomodate this. Some corporate computers have a small 4mm
slot located somewhere in the rear of the computer which accomodates a lock.
This lock has expanding teeth which lock into the slot. Fortunately for us,
this also locks the cover. In computers where this doesn't exist, or doesn't
secure the cover, you can buy cable locks which also include lock points
that stick to the computer. These lock points, I call them "lugs", have a
hole through them where the cable is routed and they stick to the computer.
Even though they stick to the case it's no easy task to remove them, usually
resulting in heavy damange if attempted. You might try this method to keep
your data secure. You can stick these things and route the cable where
access to the cabinet is very limited, if not impossible, unless the cable
is removed. You might check out Kensington as they have a good product but
other good ones are out there as well. Some more expenisve units sound a
shrill alarm if tampered with but I have no experience with these.
Even though this isn't a perfect solution a user will examine the lock and
decide it's too much effort to attempt. Or if they do attempt it'll slow
them down and create alot of noise. Any theif is in a hurry and doesn't want
attention. Any method to slow them down, and gather attention, will help
thwart their efforts.
Good Luck