**********************************************************************
Norton AntiVirus Command-Line Scanner                      README.TXT
Copyright (c) 1997 Symantec Corporation                    August 1997

**********************************************************************
HOW TO USE THIS DOCUMENT
**********************************************************************
To view README.TXT on screen in Notepad or WordPad, maximize the
Notepad or WordPad window.

To print README.TXT in Notepad or WordPad, choose Print from the File
menu.  If you use another word processor, select the entire document
and format the text in 10-point Courier before printing to ensure
proper spacing.

To print README.TXT from the DOS prompt, type COPY README.TXT PRN:

**********************************************************************
Norton AntiVirus COMMAND-LINE SCANNER
**********************************************************************
This README.TXT file explains how to use the Norton AntiVirus
Command-Line Scanner (NAVC).  The following topics are discussed:

 * System requirements
 * Installation
 * NAVC command-line switches
 * Creating a NAVC Emergency Disk
 * Virus definitions files update sources
 * Installing virus definitions files updates

System requirements
-------------------
NAVC has the following system requirements:

 * DOS 3.3 or higher
 * PC/AT 286 compatible or more advanced
 * 2 MBs of available disk space
 * 2 MBs of RAM

NAVC does not support long filenames (LFNs).

NAVC command-line switches
--------------------------
You can run NAVC from the DOS prompt, from a DOS shell in Windows, or
from the Run dialog box in Windows.  All NAVC operation is controlled
by command-line switches.

Some switches are used alone, while others are followed by either a
plus (+) or minus (-) sign.  You can use more than one switch and more
than one parameter on a command line.  The vertical bar (|) means that
you should use either parameter, but not both.  Do not type the square
brackets, which indicate optional parameters, on the command line.

NAVC pathname [options]

  pathname          Drive, directory, file, or combination of items
                    separated by spaces.
  /?                Display the help screen.
  /A                Scan all drives (A: and B: are skipped.)
  /L                Scan local drives (A: and B: are skipped.)
  /B[+|-]           Enable or disable scanning of boot records.
                    If /B[+|-] is omitted, /B+ is the default.
  /BOOT             Scan only the boot sectors of specified drives.
  /M[+|-]           Enable or disable scanning of memory.
                    If /M[+|-] is omitted, /M+ is the default.
  /MEM              Scan only memory.
  /S[+|-]           Enable or disable scanning subdirectories.
                    If /S[+|-] is omitted, /S- is the default.
  /REPAIR           Repair infected files automatically.
  /DELETE           Delete infected files automatically.
  /HALT             Halt the system if a virus is found.
  /CFG:[directory]  Specify the directory containing NAVC
                    configuration files.
  /LOG:file         Create and log to the specified file.
  /APPENDLOG:file   Append to an existing log file.
  /DOALLFILES       Scan all files, not just executables.
  /ZIPS             Scan files contained in compressed files.
  /NOBEEP           Run silently (no beeps).
  /HELPERROR        List possible DOS errorlevels returned by NAVC.
                    If desired, you can run NAVC from a batch file
                    and process the errorlevel with IF ERRORLEVEL
                    constructions.

By default, unless the /DOALLFILES switch is specified, executable
files with the following extensions are scanned: 386, BIN, CLA, COM,
CPL, DLL, DOC, DOT, DRV, EXE, NCP, NED, NNL, OCX, OV?, SCR, SYS, VBX,
VXD, and XL?

The following examples demonstrate command-line syntax for a variety
of situations.

   To scan all .EXE files in the WINDOWS directory and descending
   subdirectories:

        NAVC C:\WINDOWS\*.EXE /S+

   To scan all .EXE files in the WINDOWS directory only:

        NAVC C:\WINDOWS\*.EXE /S-

   To scan a drive and a directory on another drive:

        NAVC C: D:\NEWFILES

   To scan a directory on the network drive P: called PROGRAMS, but
   none of its subdirectories:

        NAVC P:\PROGRAMS /S-

   To scan only the boot records of drives C: and A:

        NAVC C: A: /BOOT


Creating a NAVC Emergency Disk set
----------------------------------
You can create a NAVC Emergency Disk set to start your computer and
eliminate viruses in emergency situations.  Certain boot viruses,
for example, prevent booting properly from the hard disk or
seeing the hard disk at all.

To fit the virus definitions files and NAVC program files on two
floppy disks, you must create a subset of the installed virus
definitions. This subset protects against the most common viruses.

You need two 1.44 MB floppy disks and two disk labels.

To create a NAVC Emergency Disk set:

 1 Change to the directory where you downloaded NAVC.

 2 Scan your computer to make sure it is virus-free. At the DOS prompt
   type:

   NAVC /L

   and press Enter.

 3 Format the first disk with the DOS system files. At the DOS prompt
   type:

   FORMAT A: /S

   and press Enter. Label it Disk 1. This disk is be the NAVC bootable
   disk.

 4 Format the second disk without the system files. At the DOS prompt
   type:

   FORMAT A:

   and press Enter.  Label this Disk 2. This is the virus definitions
   disk.

 5 At the DOS prompt type:

   GENWILD

   then press Enter. (You should still be in the NAVC directory.)
   This creates a subset of the most common virus definitions files.

 6 Insert Disk 1 into the A: drive and then at the DOS prompt type:

   COPY NAVC.EXE A:
   COPY NAVC.OVL A:
   COPY NAVC.INI A:

 7 Insert Disk 2 into the A: drive and then at the DOS prompt type:

   COPY NAVCOPTS.DAT A:
   COPY EXCLUDE*.* A:
   COPY INWILD*.* A:
   COPY NAVEX.EXP A:
   COPY VIRWILD.DAT A:
   COPY VIRSCAN2.DAT A:

 8 Slide open the plastic tab on the back of each disk to write-protect
   them. Then store them in a safe place.

Note: Each time you download new virus definitions files, make sure you
      update your Emergency disk set.


Updating virus definitions
---------------------------
NAVC relies on up-to-date information to detect and eliminate
viruses.  Symantec provides updated virus definitions files every
month at no charge.

The file you download is a special update program that will locate
Norton AntiVirus on your computer automatically and install the new
virus definitions files.  Its name, which changes from month to month,
uses the following form: mmNAVyy.EXE, where mm is the month and yy is
the year (for example, 01NAV97.EXE).

Updated virus definitions files are available from the following
sources:

   Internet: www.symantec.com
   Click the AntiVirus Research Center

   Internet: ftp.symantec.com
   /public/AntiVirusDefs/nav/ directory

   Symantec BBS
   541 484-6669 (8 data bits, 1 stop bit, no parity)

   America Online
   Keyword SYMANTEC

   CompuServe
   GO SYMNEW

   Microsoft Network
   GOTO SYMANTEC


Installing updated virus definitions files
------------------------------------------
The update file you download is a special program that will install
the new virus definitions files on your computer automatically.

To install the new virus definitions:

 1 Download the update program to any directory on your computer.

 2 Run the update program and answer Yes when prompted whether you
   would like to update your virus definition files.

 3 Follow all prompts displayed by the update program.

 4 The update program installs the new virus definitions files in the
   proper directory.  If prompted to overwrite, choose Yes.  Your old
   virus definitions files are being replaced with the new ones.

 5 Initiate a scan with Norton AntiVirus to make sure any newly
   discovered viruses are detected.

 7 Read the new Text Documents (*.TXT) in your NAVC directory for
   late-breaking information about newly discovered viruses and any
   special precautions that you should take.
**********************************************************************
                              END OF FILE
**********************************************************************
