

IBM AntiVirus/DOS (5555-937) and IBM AntiVirus/2 (5555-938) 
-----------------------------------------------------------

IBM AntiVirus/DOS is a comprehensive anti-virus product for DOS and
Windows (1) systems. IBM AntiVirus/2 is the corresponding product for
OS/2 (2) systems. They are designed to detect and remove viruses from
your system as simply and reliably as possible. They are the software
that IBM uses to protect its own internal personal computers. 

This file contains important notes on the use of IBM AntiVirus. Once you
have installed IBM AntiVirus, please refer to the online help and
tutorial for more information. For a short list of features that might be
new in this release, please see the section "Change History" in the IBM
AntiVirus User's Guide. 


System Requirements 
-------------------

IBM AntiVirus/DOS runs on DOS 3.3 and above, and on Windows 3.1 and
above. It requires an IBM PC, PS/2 or 100% compatible system with 640k of
RAM. The DOS portion of IBM AntiVirus/DOS requires a minimum of 450k of
free RAM, and requires more if large directories need to be checked or if
compressed files are scanned. Browsing the Virus Descriptions with the
DOS portion can require up to 480k of free RAM. The installation program
for IBM AntiVirus/DOS requires a minimum of 200k of free RAM. The IBM
AntiVirus stand-alone program requires a minimum of 400k of free RAM. 

IBM AntiVirus/DOS requires 1.6M of disk space to install only the DOS
portion, and 2.6M if both the DOS and Windows portions are installed. 

IBM AntiVirus/2 runs on IBM OS/2 2.0 and above. It requires an IBM PC,
PS/2 or 100% compatible system, and 1.5M of disk space. 

The IBM AntiVirus DOS Shield requires 0k to 20k bytes of conventional DOS
memory, depending upon what options are chosen. 


IBM AntiVirus Time-Out Message 
------------------------------

IBM AntiVirus will display a time-out message if your current version
should be updated. By default, this message is displayed seven months
after the release of this version of IBM AntiVirus. IBM AntiVirus will
not necessarily detect all viruses that have been written after your
current version was released. The program will still function normally
when this message is displayed. It is just a reminder that it is time to
update. 

This version of IBM AntiVirus will start displaying its time-out message
on June 15, 1995. 


Installing IBM AntiVirus 
------------------------

The IBM AntiVirus installation diskettes contain everything you need to
install IBM AntiVirus on your system. 

One of your installation diskettes contains the IBM AntiVirus stand-alone
program. Installation packages that have a single diskette have the
stand-alone program on that diskette. Packages with multiple diskettes
have it on the last diskette in the set. The stand-alone program is
provided for your use when you cannot access the usual IBM AntiVirus
program due to virus problems on your system. The stand-alone program can
also be incorporated into BAT or CMD files. See the Introduction and
User's Guide for more information on the stand-alone program. 

To either install or update IBM AntiVirus, DOS and OS/2 users can insert
the first installation diskette into a diskette drive. From a command
line session, run the installation program as follows: 

C:\> A:\INSTALL


Windows users should insert the second installation diskette into a
diskette drive (if this is a multiple-diskette installation set). Then
select Run from the File menu of the Program manager window. In the
Command line entry field, type 

A:\SETUP


This will bring up the main window of IBM AntiVirus Install. To install
IBM AntiVirus with all of the default settings, simply select the Start
install push button. 

If this is the first time you have installed IBM AntiVirus, IBM AntiVirus
Install will, by default, install it into C:\IBMAV, and set up the DOS
Shield to load whenever a DOS session starts. 

Automated checking will be set up to run weekly. On DOS and Windows
systems, it will run the first time your system is started that week. On
OS/2 systems, it will run at 3:00 AM on Monday morning. If your OS/2
system is not turned on at that time, it will run shortly after your
system is started the next time. 

If you have installed IBM AntiVirus previously, IBM AntiVirus Install
will, by default, update your current version and will keep all of your
current settings. 

The defaults for the installation program have been constructed to
provide the best protection for your system. We recommend that you accept
all of the defaults by choosing automatic installation. If, however, you
want to change the default settings before you install IBM AntiVirus, you
can use the menus on the main window of IBM AntiVirus Install. 

If you install IBM AntiVirus/DOS into two different directories (or
install another version in a different directory), the Windows icon will
continue to point to the old directory. You should change the program
properties in Windows to make the icon point to the new directory. 

If you install IBM AntiVirus/2 into two different directories, two
different icons will be created, one pointing to each directory. You
might wish to remove the old icon and directory in this case. 

If you have previously installed IBM AntiVirus/2 Version 1.00, please
note that it installed in C:\IBMAV2 by default. Later version of IBM
AntiVirus/2 install in C:\IBMAV by default. You might wish to remove the
old files and directory after installing the new version. 

Some viruses affect the ability of Windows systems to operate unless the
proper anti-virus precautions are taken. In some cases, they can make it
impossible to start Windows. For this reason, we recommend that Windows
users have the "Prevent common DOS viruses" feature of the IBM AntiVirus
DOS Shield installed at all times, and that Automated checking be set up
to check the system periodically. 

IBM AntiVirus/DOS and IBM AntiVirus/2 use some of the same files for
their operation. If you are using both and update one, you must update
the other at the same time to ensure correct operation. 

More information about the install program, including command-line
options and return codes, can be found in the User's Guide. 


Troubleshooting Notes for IBM AntiVirus 
---------------------------------------

Every effort has been made to ensure that IBM AntiVirus is compatible
with your system. This section describes some problems that might be
encountered during installation, and how you can deal with them. Please
refer to the IBM AntiVirus User's Guide for troubleshooting information
on the use of IBM AntiVirus in general. 

New viruses continue to be written and released. A small fraction of them
become widespread problems. To deal with these new viruses most
effectively, any anti-virus software should be kept up to date. If IBM
AntiVirus determines (from your system clock) that it is over seven
months since this version was released, it will tell you that it should
be updated. You will see this message whenever IBM AntiVirus completes a
check of your system. If you see this message, you should obtain and
install the most recent version of IBM AntiVirus. 

When IBM AntiVirus/DOS is being run immediately after installation, you
may encounter a message like "Cannot initialize for virus checking". The
log will contain the message "Could not open input file - VERV.VDB." This
indicates that insufficient file handles were available on your system
when installation began. The installation program will set the number of
file handles so that enough are available, but any increase will only
occur when you reboot your system. You should reboot your system and
reinstall IBM AntiVirus/DOS. 

Problems during install might also indicate the presence of a virus. To
check for viruses, power off your system, reboot from a write-protected,
virus-free system diskette, and use the IBM AntiVirus stand-alone program
(IBMAVSP) to check and repair your system. 

If you encounter the message "Out of environment space" when your DOS
system is booting, just after you have installed IBM AntiVirus/DOS, you
may need to increase your DOS environment space. You can do this by
increasing the numeric value after the /E parameter of the SHELL= command
in your AUTOEXEC.BAT. See your DOS documentation for more information on
the SHELL= command. 

A previous version of IBM anti-virus software included a program named
VSTOP.COM. As a convenience to users of this earlier version, the IBM
AntiVirus installation program examines the AUTOEXEC.BAT file for
statements that seem to refer to this program, and either adds the word
REM at the beginning of the line (converting the statement into a
comment), or displays a message advising you that VSTOP should be removed
from the AUTOEXEC.BAT. If you use some other program named VSTOP, not
related to IBM AntiVirus, you should examine your AUTOEXEC.BAT file after
installation to ensure that it is still correct. 

Some systems allow you to boot from the internal ROM, rather than from a
diskette or hard drive. Some IBM PS/1 and PS/2 models have this feature.
If these systems are set up to boot from ROM, it might not be possible
for the IBM AntiVirus installation program to modify the AUTOEXEC.BAT
file to enable Automated checking. If this occurs, change the system
configuration to boot from the hard drive, and try installing IBM
AntiVirus again. 

OS/2 users should use IBM AntiVirus/2 to protect their systems. While IBM
AntiVirus/DOS will in general work correctly in DOS sessions under OS/2,
it will be somewhat limited in what it can do. For instance, it will not
be able to check the boot records of drives that use the HPFS file
system, and it will not be able to repair infected master boot records. 

The IBM AntiVirus DOS Shield installs itself as a resident extension in
your DOS system if you request it. Although it is rare, some other
resident extensions might conflict with the DOS Shield. If you encounter
a problem with other resident programs, and the problem goes away if you
tell IBM AntiVirus not to install the DOS Shield, this might indicate a
conflict. In those case, move the call to IBMAVDR (or IBMAVDS, if you are
using IBM AntiVirus/2) further down in your AUTOEXEC.BAT file, after the
calls to resident extensions with which it might conflict. 

In previous releases, IBM AntiVirus/2 adjusted its priority during
automated checks to minimize its impact on the performance of other
programs. This feature is disabled by default in IBM AntiVirus/2 version
2.0. To enable it, edit the file USER.PRF in the directory in which IBM
AntiVirus/2 is installed. Change the line: 

RUN_WATCHDOG.0

to: 

RUN_WATCHDOG.1

then save the file. This will cause IBM AntiVirus/2 to adjust its
priority when running automated checks. If you enable this feature,
select Setup->Automated check and make sure that Open minimized is
checked. This will ensure that automated checks are opened minimized.
When an automated check is running with priority adjustment enabled, do
not maximize IBM AntiVirus/2. Running automated checks maximized with
priority adjustment enabled can cause unpredictable results and is not
recommended. 


Note for Reviewers and Testers 
------------------------------

IBM AntiVirus is optimized to perform best in a typical real-world
incident, involving a small number of viruses in a typical number of
files. If you would like to test simply to see how many viruses in your
collection the program detects, we recommend you use the stand-alone
program IBMAVSP from the last installation diskette. For instance, you
could copy your collection to a RAM drive (say E:), and then issue the
command 

IBMAVSP E: -ALLFILES -LOG -VLOG -NREP -YWIPE -SCOMP

to automatically scan all files (and scan inside compressed files),
erasing any files found to be infected. A log will be created in the
current directory. (The options are to avoid the prompts that would guide
a real end-user through the process.) Of course, the raw number of
viruses found is not alone a good measure of the quality of an anti-virus
program. 

(1) Microsoft and Windows are trademarks of Microsoft Corp. 

(2) IBM and OS/2 are trademarks of IBM Corp. 

(3) Novell and NetWare are trademarks of Novell Corp. 
