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viruskil.doc
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1989-08-18
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ST Virus Killer
Copyright 30/8/1988 By M.S.Powell
Icons by Bellis
THIS PROGRAMS IS PUBLIC DOMAIN.
Permission is granted to copy this
program along with it's documentation
as long as such copying is not for
profit.
Getting started
---------------
After executing the file
VIRUSKIL.PRG you "should" be presented
with several icons for you to "click"
on.
Icons
-----
These icons are as follows:-
A B
Examine Install
Remove Exit
Drive icons
-----------
The A and B are the drives A and B
respectively. These determine which
floppy drive the virus killer will
operate on. If you only have one drive
then you will not be able to select the
drive B icon.
Examine
-------
Clicking on the Examine icon will cause
the virus killer to produce information
about the disk in the current drive.
This information is:-
Executable, possible virus.
The boot sector is executable.
ie the program on this boot sector
will be executed, if the ST is booted
up with this disk in. On a standard
disk this should, of course, not be the
case. If you, yourself, have not put
this program onto the boot sector then
this may be a virus, and if this is so
should be done away with. However, some
commercial disks (particularly games)
may have a short "boot" program (now
you see why it's called a boot sector)
to load in the program/game. If you
remove a commercial disk's boot sector
then you will, more than likely, not
be able to use that particular program
again. Unfortunately it is not possible
for a piece of software, such as this,
to tell a virus from a "genuine" boot
program, so you must execise your
judgement when it comes to getting
rid of such boot sector programs.
NB The authors can accept no
responsibility for disks "damaged" in
this way or any other data loss
resulting in the use of this program.
Boot sector not executable
This means the boot sector
will not execute on boot up and you
have nothing to worry about.
Anti virus installed
This means an anti-virus
(produced by this program) has been
placed onto this disk's boot sector.
Install
-------
This option will install an
anti-virus program onto your disk's
boot sector. On boot up this program
will simply display the message
"virus free disk" on your screen, so
that you know that this particular disk
hasn't got a virus on it. If a disk
with an anti-virus installed comes into
contact with a virus, the virus will
write itself over the anti-virus. Then
the next time you boot up with that
disk you won't get the "virus free"
message, because the anti-virus program
has been written over by the virus
program. So, on boot up, if you are
expecting the message and you don't get
it, you immediately know that a virus
has written itself onto that disk. You
can then get rid of it before it
spreads and of course examine your
other disks for the source of this
virus. Also on monochrome systems the
anti-virus will reverse the screen to
produce white characters on a black
background, when the desktop appears.
Technical info....
In no way does the anti-virus
"wedge" itself into memory as would
a virus. It simply executes on boot up
and is then forgotten about.
Remove
------
If you don't wish to have an
anti-virus on your disk, but just
want to get rid of the virus, then the
remove option will simply, remove any
program that may be present on a boot
sector (including viruses and game boot
programs!)
Exit
----
This option will return you
to the desktop. (Or to the calling
program, if you want to be perdantic)