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                    Norton AntiVirus 3.0 Update READ.ME
                                February 1996
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                 Copyright (c) 1995-96 Symantec Corporation


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WHAT UPDATE.EXE IS
******************

To help you maintain current protection against computer viruses,
including the newly discovered macro viruses, Symantec is distributing
UPDATE.EXE.  This program updates your already installed Norton AntiVirus
version 3.0 to the latest detection capabilities.


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WHAT UPDATE.EXE DOES
********************

UPDATE.EXE first examines the NAV installation on your local
machine to determine if it is the Windows standalone workstation
or Network Manager version. It then extracts the appropriate files.


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FLOPPY DISK REQUIREMENTS
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You can extract files to a temporary directory on your
hard disk, or to blank, formatted floppy disks. If extracting
to disks, you will need the following:

Format:                   1.44Mb
-------                   ------
Disks Needed (Windows):     3
Disks Needed (Net Mgr):     4

(If you need 1.2Mb installation diskettes, contact Symantec
Customer Service.)

NOTE: TO EXTRACT THE NETWORK MANAGER VERSION OF NAV, YOU MUST HAVE
EITHER NAVNET.EXE OR NAVNETW.EXE IN THE FIRST NAV DIRECTORY IN YOUR
PATH.  IF NEITHER OF THESE FILES ARE IN THAT DIRECTORY, YOU MUST
COPY THEM FROM YOUR NETWORK MANAGER INSTALLATION DIRECTORY.  SEE
SPECIAL INSTRUCTIONS BELOW FOR USING UPDATE.EXE TO UPDATE YOUR
NETWORK MANAGER INSTALLATION OF NAV.

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UPDATING PROCEDURE
******************

Please read this procedure before you complete it.

To update your NAV version:

1. Scan with your installed NAV version to verify that you
   are not infected.

2. Type the following command at the DOS prompt, and
   press Enter:

    UPDATE [DESTDIR]

   where [DESTDIR] represents the path where the files required for
   installation will be placed. This should be a temporary directory.
   
   (NOTE: DO NOT SPECIFY THE DIRECTORY WHERE YOUR CURRENT NAV VERSION
    RESIDES AS THE DESTINATION DIRECTORY).

   The files are extracted to the destination you specify. If extracting
   to floppy disks, label them sequentially (#1, #2, #3, and so forth)
   as they are created.

3. When all files are extracted, change to the drive and directory
   where they reside.

   You can now run the standard installation program.

   (NOTE: DO NOT INSTALL THE WINDOWS STANDALONE WORKSTATION VERSION OVER
    A COPY OF NETWORK MANAGER. TO ENSURE THAT YOU ARE INSTALLING NAV NETWORK
    MANAGER, CHECK THE EXTRACTED INSTALLATION FILES FOR NAVUPDAT.* AND
    NAVNET*.*)

4. Type INSTALL.EXE and press Enter to complete the upgrade process.


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SPECIAL INSTRUCTIONS FOR USERS OF THE NETWORK MANAGER VERSION OF NAV
********************************************************************

To extract the Network Manager version of NAV, you must have either
NAVNET.EXE or NAVNETW.EXE in the first NAV directory in your path.
If neither of these files are in that directory, you must copy them
from your Network Manager installation directory.

Before installing, make sure that you have extracted the appropriate
files.  To ensure that you are installing NAV Network Manager, check
the extracted installation files for NAVUPDAT.* and NAVNET*.*

Please note that this update modifies _DEFAULT.NNS.  In addition to
installing the update, you must modify your custom *.NNS files using
a text editor with the following changes:

In the section [InstallFiles], add these lines
   NAVEX.DAT
   NAVEX16.DLL

In the section [DefinitionUpdateFiles], add these lines
   NAVEX.DAT
   NAVEX16.DLL

These files replace the functionality of all previous special
detection and repair files VIRSP??.DAT that are distributed with the
monthly definitions.

You do not need to remove any existing lines from any *.NNS file.

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