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AVDISK.TXT
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AVDisk 9.2e
===========
System requirements:
- 80386 or better processor
- MS-DOS 4 or better
- for NTFS partitions:
NTFSDOS from http://www.sysinternals.com
1. The purpose of this program
------------------------------
AVDisk will help you create a set of rescue disks. Booting from
clean rescue disks is necessary when your computer becomes
infected with a memory resident virus. By booting from a floppy,
the virus won't be activated and therefore won't be able to
install itself in memory where it could otherwise interfere with
the scanning and cleaning process.
Please note that no virus scanner is 100% fail-safe, no matter how
diligently you update it and regardless of what the scanner
manufacturer tells you. It is of paramount importance that you
practice what is called "safe hex", i.e. that you follow a set of
safe computing rules. The importance of safe hex cannot be stressed
enough.
Competent and free information about viruses and virus protection
can be found here: http://www.claymania.com/nav-map.html
2. What is on the rescue disks?
-------------------------------
The first floppy contains the FreeDOS operating system, an MS-DOS
clone. A variable number of additional floppies contain the
anti-virus program.
3. Which anti-virus programs are supported?
-------------------------------------------
Currently, the DOS versions of the following anti-virus programs
are supported:
- F-Prot (http://www.f-prot.com)
- AVPDOS32 (http://www.avp.ch)
- McAfee ScanPM (http://www.mcafee.com)
- ESET NOD32 (http://www.nod32.com)
- EZ Antivirus (formerly known as Inoculate IT PE)
(http://www.my-etrust.com)
(The DOS program is part of the Win9x/NT/2000 download)
- Grisoft AVG (http://www.grisoft.com)
(The DOS program is part of the Win9x download)
- Dr. Web (http://www.sald.com)
- Trend Micro PC-Cillin (http://www.trend.com)
(The DOS program is part of the Win9x download)
- Sophos AntiVirus (Sophos Sweep) (http://www.sophos.co.uk)
The following anti-virus programs are not supported:
- H+BEDV's AntiVir
The freeware DOS scanner is highly inflexible and cannot
scan entire drives.
- Norton Antivirus
The DOS version is very large and requires an inordinate
number of floppies.
Please note that NO Windows program is supported, simply because
it's not possible to boot Windows from floppy.
If there is an anti-virus program for which you think we should add
support, drop us a note if the program meets the following requirements:
- There must be a DOS version of the program.
- It must not be too severely crippled.
- It should not be too large.
- We must be able to obtain a functional copy of the program in
order to add support.
4. Contents of the AVDisk zip file
----------------------------------
The AVDisk archive should contain the following files:
Name purpose
------------ ---------------------------------------------------------
SETUP.BAT Run this program to install AVDisk
AVDISK.TXT This file
INSTALL.DAT The actual installation program, do NOT run this directly
UNZIP_A.DAT An unzipper, there is no need for you to run it directly
UZLICENS.TXT The license file for the UnZip program
LANGUAGE.RES Language file
DATA.ZIP The actual AVDisk program, do NOT unpack this directly
NTFSDOS.EXE A dummy NTFSDOS.EXE file, do NOT delete this file!
PGPSIG.ZIP PGP signatures
QMS.EXE Memory scanner
QMS.INI Configuration file for QMS.EXE
5. Installation
---------------
In order to install AVDisk, please run the SETUP.BAT file.
First, a memory scan will be performed to ensure that no virus
is lurking in memory. Please note that the program scans for
DOS viruses only.
If the memory scanner reports a virus, do not panic and prepare
the boot disks on another computer which you know to be clean.
Do not take drastic measures such as formatting.
After the memory scan the installation program will be launched.
It will search for supported anti-virus programs on your computer
and then ask you to select one of them. Boot disks will be created
for the program that you select here.
If you want to create several sets of boot disks for different
scanners, you must run the installation once for each scanner.
Then you will be prompted to select an instance of the NTFSDOS
program. Please take a look at section 9, NTFS.
Please note that you MUST select an instance of this program even
if you do not plan to scan NTFS drives.
Finally, you will be asked to choose the desired keyboard layout
for the boot disks and the language for the actual AVDisk program.
The installation program will create a subdirectory named AVDISK
in the directory where the anti-virus program that you chose resides.
It will copy all necessary files to that subdirectory and run
avdisk.exe.
If everything works fine, you can delete the original AVDisk archive
that you downloaded, and the files that it contained unless you want
to run the installation process again for another virus scanner.
Please note that for each virus scanner for which you want to create
boot disks there must be a separate instance of AVDisk.
6. Creating rescue disks
------------------------
Under normal circumstances, AVDisk will be invoked automatically
by the setup program and should be able to create the rescue
disk set on its own. Just follow the on-screen instructions
guiding you through the creation process.
However, in some cases it might be necessary to launch avdisk.exe
separately, for example if you lose your boot disks and want to
create a new set. In order to launch avdisk.exe directly, you can
click on it in the Windows Explorer or run it on the command line
in a DOS window.
All command line parameters can be viewed by specifying the help
switch:
avdisk.exe /?
You will be shown a list of all available parameters and short
descriptions on their use as well as the languages AVDisk can speak
and all available keyboard definitions for the floppy disk set (see
below for usage notes). All parameters can be mixed.
You may also specify the keyboard layout for the rescue disks on
the command line:
avdisk.exe /keydef:xx
where xx is either a "long" language name or a short keyboard code,
as in the following list:
us : English
gr : German
fr : French
it : Italian
sp : Spanish
More country codes may be supported. Check "avdisk.exe /?" for a full
list of all supplied keyboard layouts. However, not all of them could
be tested and can be guaranteed to work.
So you can e.g. either use
"avdisk.exe /keydef:fr"
or
"avdisk.exe /keydef:French"
to set the keyboard layout to French.
The current list of supported keyboard layouts can be viewed using the
help switch (see above). If no keyboard language is given, avdisk.exe
will default to one matching the language it currently "speaks".
Additionally avdisk.exe supports the following command line switches:
/forceupdate
Forces AVDisk to update disks even if the AVDisk versions do not match.
In that case AVDisk does not care whether there is already something
on the floppy.
/tempdir:xyz
Instructs avdisk.exe to use the directory xyz as the temporary directory.
The default is the directory specified by the %temp% environment
variable.
/setlanguage:xyz
Switches the language AVDisk "speaks". If, for some reason, you want to
change the program language after the initial setup, use this switch.
Currently, you may replace xyz with either ENGLISH, FRENCH or GERMAN.
Do not mix this up with the /keydef switch, which only controls the
keyboard layout of the rescue disk.
For a current list of all supported languages, use the help switch.
/verbose
By default, avdisk.exe will tell you not much concerning what is going
on "behind the scene". If you use the /verbose switch, avdisk.exe will
show all status messages on the screen. The entries in the log file
(avdisk.log) behave accordingly.
In case you want to report a problem during disk creation, please use
the /verbose switch and send us the log file along with your problem
description. This will make troubleshooting easier.
IMPORTANT NOTE: you should conduct a test run immediately after
you created the boot disks to see if they work. It would be
unfortunate for you to discover that they don't work when you
most need them...
7. Notes and hints
------------------
If you encounter problems with the installation program,
you can try to specify the "safe" command line parameter
when running setup.bat (without the quotes), for example:
setup.bat safe
In that case, install.exe will search for anti-virus
programs only on drive C: and it will "behave" more
cautiously. Though in most cases there should be no problems.
The installation program might search for anti-virus programs
on CD-ROMs under Windows, however in such a case it is not
possible to choose an anti-virus program located on a CD-ROM
since CD-ROMs cannot be written to.
8. Reporting a bug
------------------
8.1 Known problems
------------------
Some Windows 98 users might experience hangs of AVDisk when it
copies files to floppy. At this time, it looks like this problem
is Windows-related. If it occurs on your system, try to use the
program in pure DOS mode. This should always work.
As AVDisk uses FreeDOS (which is still in beta phase) as its disk
operating system, you might experience that not all AV programs
work perfectly -- some may hang your machine in certain situations
or refuse to work at all. Since FreeDOS is not yet 100% MS-DOS-
compatible, there is not much we can do about this than wait for a
newer version of the FreeDOS kernel.
This makes it even more important that you test your newly created
floppy disk set.
8.2 Send email
--------------
If you discover a bug, make sure you have the latest version
of the program as the bug may already have been fixed. See
"Credits" for the address of the official AVDisk home page.
If the bug still exists in the most recent version, send email to
quantensprung@gmx.net and fbonroy@mail.dotcom.fr
Bugs in QMS must be reported to Ralph Roth at RalphRoth@gmx.de
Please describe your problem and be as specific as possible:
- which version of AVDisk are you using?
- which part of AVDisk is causing trouble (installation, AVDisk itself,
the boot disks)?
- which operating system are you using (name, version)?
- describe the symptoms and the circumstances under which the
bug occurs
- if applicable, send the log file avdisk.exe produces (avdisk.log in
the AVDISK subfolder of your anti-virus program) along with your
mail. This makes troubleshooting easier. If the problem can be
reproduced, use the /verbose switch on avdisk.exe to produce a
detailed logfile.
Of course, you may also report spelling and grammar mistakes. ;-)
9. NTFS
-------
DOS anti-virus programs are usually not capable of scanning
NTFS volumes. NTFS is a special file system used by Windows
NT, 2000 and XP. It is not used by Windows 95, 98 or ME, so
if you have one of those you need not worry about NTFS.
Please note that Windows NT, 2000 and XP do not necessarily
use NTFS either, although they probably do on most computers.
In order to be able to scan NTFS partitions, you need to
obtain a special driver called NTFSDOS from http://www.sysinternals.com.
Uncompress the ZIP archive and run the AVDisk installation procedure.
When asked to select an instance of NTFSDOS, choose the one you just
downloaded and not the one that is shipped with AVDisk.
Please note that this is a free version that allows for read
access only. You will not be able to disinfect infected files.
10. Credits
----------
The official AVDisk homepage is
http://www.avdisk.org
The official QMS homepage is
http://come.to/rose_swe
The following people are involved in AVDisk:
Digital56k - wrote the original AVDisk batch files
Deniz Oezmen - wrote SearchRD and the current avdisk.exe
Steven Craik - worked out AVPDOS32 support for AVDisk
Frederic Bonroy - wrote install.exe and this help file
Axel Pettinger - worked out support for NAI ScanPM
Ozzie Ostrich - helped inventing the update mode for W2K
Ralph Roth - wrote QMS and ENVINFO
Clay - tested AVDisk with EZ Antivirus
Robert Green - wrote the CSFD system used on the startup floppy
Uzi Paz - solved a keyboard layout problem
The Condor - merciless beta tester
Art Kopp - intensive beta testing and bug reporting
11. Info-ZIP
------------
This AVDisk distribution contains a slightly modified version of
Info-ZIP's UnZip utility (called UNZIP_A.DAT or UNZIP_A.EXE). This
is NOT an official release of the Info-ZIP team and therefore not
supported by them. If you have any questions regarding this program,
please contact the AVDisk folks (cf. section 8.2 of this document).
If you want to use UnZip or Zip for your own purposes, we strongly
recommend getting your own unmodified copy at http://www.info-zip.org
(it's freeware).
You may find the license text for UnZip in the file UZLICENS.TXT that
came with this archive.
12. Legal drivel
---------------
- This program is freeware and you are encouraged to distribute it.
You may NOT charge money for the distribution of AVDisk.
- You may NOT modify any of the files included in the AVDisk
archive and you may NOT distribute modified files.
- You may NOT distribute AVDisk together with malicious software
of any kind. This includes joke programs and virus construction
kits as well as virus creation documentation.
- You may distribute only the entire AVDisk archive; you may NOT
distribute single files. Likewise, you may NOT add files to the
AVDisk zip file.
- You agree to use this program at your own risk. It has been
tested thoroughly and contains no potentially dangerous code;
however malfunction can never be completely ruled out.
- The included program "qms.exe" is licensed for use in conjunction
with this software distribution only. You may not use it otherwise
or even distribute it without the AVDisk package. For detailed
information, see the QMS website (section 10).