

IBM AntiVirus 
-------------

IBM AntiVirus is a comprehensive anti-virus product for DOS, Windows (1),
Windows 95 (1), and OS/2 (2) systems. It is designed to detect and remove
viruses from your system simply and reliably. It is 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. 

The following changes have been incorporated into IBM AntiVirus for
release 2.4.1: 

* By default, IBM AntiVirus now scans *.DOC files and *.SMM files as
  standard program files. 
  
  
* A scheduling problem in IBM AntiVirus for Windows 95 has been corrected
  to eliminate unnecessary scans. 
  
  
* IBM AntiVirus has been modified to scan laptops after they have
  returned from suspend mode. This has been implemented on OS/2 and
  Windows 95 systems and ensures that laptops are scanned on a regular
  basis, although they may not have been rebooted. 
  
  
* IBM AntiVirus is now compatible with the Advanced Power Management
  (APM) function on 755CX ThinkPads running OS/2. 
  
  
* Users with S3 video chips can now use IBM AntiVirus to scan memory on
  Windows 3.1 systems. 
  
  
* A new convention for version numbers has been implemented. Version
  numbers have been modified slightly to accommodate IBM AntiVirus
  maintenance releases. 
  
  
* Many more known viruses are detected, including the Boza virus, a
  non-resident EXE file infector for Windows 95 systems. IBM AntiVirus
  also detects the macro viruses Hot and Green Stripe. 

These changes are also documented in the section "Change History" in the
IBM AntiVirus User's Guide. 


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

IBM AntiVirus includes IBM AntiVirus for DOS, IBM AntiVirus for Windows,
IBM AntiVirus for Windows 95, and IBM AntiVirus for OS/2. They are
provided on three sets of installation diskettes: 

* IBM AntiVirus for DOS and IBM AntiVirus for Windows are provided on two
  1.44MB diskettes. IBM AntiVirus for DOS requires an IBM PC, IBM PS/2,
  or 100% compatible system with an 8088 or higher processor, a minimum
  of 640KB of memory, and DOS version 3.3 or higher. IBM AntiVirus for
  Windows requires an IBM PC, IBM PS/2, or 100% compatible system with an
  80386 or higher processor, and Windows 3.1 or Windows 3.11. If only IBM
  AntiVirus for DOS is installed, it occupies 1.8MB of disk space. If
  both IBM AntiVirus for DOS and IBM AntiVirus for Windows are installed,
  they occupy 3.0MB of disk space. 
* IBM AntiVirus for Windows 95 is provided on two 1.44MB diskettes. It
  occupies 2.0MB of disk space when installed. 
* IBM AntiVirus for OS/2 is provided on two 1.44MB diskettes. It requires
  an IBM PC, IBM PS/2, or 100% compatible system, and OS/2 version 2.0 or
  higher. It occupies 1.7MB of disk space when installed. 

IBM AntiVirus for DOS requires 472KB of available memory for scanning,
and up to 491KB for browsing virus descriptions. The IBM AntiVirus for
DOS install program requires only 337KB. The IBM AntiVirus stand-alone
program requires 441KB of available memory. In DOS, Windows, and OS/2,
the IBM AntiVirus System Shield occupies up to 20KB of memory, depending
upon which 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 September 21, 1996. 


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. The stand-alone program for IBM AntiVirus for DOS, IBM AntiVirus
for Windows, and IBM AntiVirus for Windows 95 is located on the last
installation diskette. The stand-alone program for IBM AntiVirus for OS/2
is located on the first installation diskette. 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 should: 

 1. Insert the first installation diskette into a diskette drive. 
 2. From a command line session, run the installation program as follows:
    
    C:\> A:\INSTALL
    
    

Windows 3.1 or 3.11 users should: 

 1. Insert the first installation diskette into a diskette drive. 
 2. Select Run from the File menu of the Program manager window. 
 3. In the Command line entry field, type: 
    
    A:\SETUP
    
    

Windows 95 users should: 

 1. Insert the first installation diskette in a diskette drive. 
 2. Click on the Start icon. 
 3. Select Run.... 
 4. Enter the following in the Open: entry field: 
    
    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 Next
push button on each installation screen. 

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. Note that the default
installation directory for IBM AntiVirus for Windows 95 is C:\IBMAV95. 

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 and Windows 95 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 change these values on each IBM AntiVirus Install screen. See IBM
AntiVirus Install Help for further information. 

If you install IBM AntiVirus for OS/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 for OS/2 Version 1.00,
please note that it installed in C:\IBMAV2 by default. Later version of
IBM AntiVirus for OS/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 for DOS and IBM AntiVirus for OS/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 or by using
the Help push button during the installation. 


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 for 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 for 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 for 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 for OS/2 to protect their systems.
While IBM AntiVirus for 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 System 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 System Shield. If you
encounter a problem with other resident programs, and the problem goes
away if you tell IBM AntiVirus not to install the System Shield, this
might indicate a conflict. In those case, move the call to IBMAVDR (or
IBMAVDS, if you are using IBM AntiVirus for OS/2) further down in your
AUTOEXEC.BAT file, after the calls to resident extensions with which it
might conflict. 

In previous releases, IBM AntiVirus for OS/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 for OS/2
version 2.0. To enable it, edit the file USER.PRF in the directory in
which IBM AntiVirus for OS/2 is installed. Change the line: 

RUN_WATCHDOG.0

to: 

RUN_WATCHDOG.1

then save the file. This will cause IBM AntiVirus for OS/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 for OS/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, Windows, and Windows 95 are trademarks of Microsoft Corp. 

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

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


