Dec 242017
 
Add password protection to HD.
File PCLOK22.ZIP from The Programmer’s Corner in
Category HD Utilities
Add password protection to HD.
File Name File Size Zip Size Zip Type
ADMIN.COM 10398 4975 deflated
BRK-CNTL.COM 7304 2059 deflated
DESTALL.COM 11730 6395 deflated
HIDE.COM 6600 1003 deflated
INSTALL.COM 22850 13367 deflated
LOCK-KB.COM 288 253 deflated
LOCK-KB.PIF 369 70 deflated
ORIGDISK.COM 8986 3694 deflated
PASSWORD.COM 10890 5470 deflated
PC-LOCK.DOC 34042 9072 deflated
READ-ME.1ST 835 417 deflated
SET-TIME.COM 822 656 deflated
TPCREAD.ME 199 165 deflated
UNHIDE.COM 6602 1004 deflated
UNLOCK.COM 9130 3853 deflated
WHO.COM 6810 1563 deflated

Download File PCLOK22.ZIP Here

Contents of the PC-LOCK.DOC file

































PC-Lock Version 2.2
Hard Disk Protection System

(c) Copyright 1987 by
Johnson Computer Systems, Inc.






INTRODUCTION
INTRODUCTION

Thank you for buying PC-Lock version 2.2. We believe you will
find it to be an effective and convenient security system for
your IBM-PC/XT/AT or compatible. Version 1.1 was reviewed in the
June 23, 1987 issue of PC-Magazine and listed among "The Best of
the Best Utilities." Version 2.1 provided enhanced security and
several new features including:

Simplified multi-system installation,
An administrator password,
Multiple user passwords,
Support for large hard disks,
Support for multiple hard disks,
Works with the EGA controller/display,
Ability to prevent user's from breaking out of AUTOEXEC,
and others described below.

Version 2.2 offers all of the features of version 2.1 plus a
"High Security" option which is described below, and enhancements
to allow PC-Lock to be used on the IBM 3270 and PS/2 Model 30.
(PC-Lock 2.1 worked on other PS/2 models.) Version 2.2B is the
first version wich supports both "lunchbreak" and MS-Windows.


WHAT PC-Lock DOES
WHAT PC-Lock DOES

After you install PC-Lock you will be asked to enter a password
each time you boot your computer from your hard disk. Just type
your password and press return. The boot process will continue
normally. When you boot from a diskette the system will boot
normally, but you will not be able to access your hard disk.

Any time after your computer has finished booting from your hard
disk, you may press the shift key on the left side of your
keyboard 3 times in succession. This will cause the screen to
become completely blank. The computer will continue with the
task it was performing, but will throw away any characters typed
at the keyboard (including Ctrl-Alt-Del) until you enter your
password again. The screen and keyboard will then return to
normal.

PC-Lock provides an administrator password and a maximum of four
user passwords, allows you to prevent a user from breaking out of
the AUTOEXEC batch file, and allows a different AUTOEXEC sequence
for each of the five possible users.

PC-Lock is a software security program and is probably somewhat
more secure than a dead bolt lock on your front door. A
sufficiently knowledgeable and determined individual will be able
to circumvent the system, as indeed any software security system
can be circumvented. The level of protection is, however,

PC-Lock Version 2.2B - Page 2







sufficient for most purposes. Please note that PC-Lock files are
encrypted and will not decrypt themselves if someone is using a
debugger to find out how they work.


DISCLAIMER OF WARRANTY
DISCLAIMER OF WARRANTY

PC-Lock SOFTWARE AND THIS DOCUMENTATION ARE SOLD "AS-IS" AND
WITHOUT WARRANTIES AS TO PERFORMANCE OR MERCHANTABILITY. THE
SELLER'S SALESPERSONS MAY HAVE MADE STATEMENTS ABOUT THIS
SOFTWARE. ANY SUCH STATEMENTS DO NOT CONSTITUTE WARRANTIES AND
SHALL NOT BE RELIED ON BY THE BUYER IN DECIDING WHETHER TO
PURCHASE THIS PROGRAM.

PC-Lock SOFTWARE AND THIS DOCUMENTATION IS SOLD WITHOUT ANY
EXPRESS OR IMPLIED WARRANTIES WHATSOEVER. BECAUSE OF THE
DIVERSITY OF CONDITIONS AND HARDWARE UNDER WHICH THIS PROGRAM MAY
BE USED, NO WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE IS
OFFERED. THE USER IS ADVISED TO BACKUP ALL DATA ON HARD DISKS
BEFORE TRYING IT, AND TO THOROUGHLY TEST IT BEFORE RELYING ON IT.
THE USER MUST ASSUME THE ENTIRE RISK OF USING THE PROGRAM. ANY
LIABILITY OF SELLER OR MANUFACTURER WILL BE LIMITED EXCLUSIVELY
TO PRODUCT REPLACEMENT OR REFUND OF THE PURCHASE PRICE.

If within thirty days after we ship your order, you wish to
discontinue using PC-Lock because it does not perform to YOUR
expectations, we will be happy to refund your full purchase
price. Just write to us stating that you will no longer have PC-
Lock installed on your computer(s) because it doesn't meet your
requirements. Enclose the original label(s) from your PC-Lock
diskette(s) with your letter. We would appreciate a description
of the problem(s) you encountered, but you are in no way
obligated to provide one.


YOUR PC-Lock LICENSE
YOUR PC-Lock LICENSE

After you have read and agree to the Disclaimer of Warranty you
are licensed to install and use PC-Lock Version 2.2 on the number
of computers for which you have paid the license fee as shown in
the fee schedule below. Removing PC-Lock from one computer and
installing it on another is specifically permitted and does not
increase the number of computers for which the license fee must
be paid.

PC-Lock Version 2.2 is a fully copyrighted software product and
Johnson Computer Systems, Inc. reserves all rights not
specifically granted in this license.





PC-Lock Version 2.2B - Page 3







PC-Lock PASSWORDS
PC-Lock PASSWORDS

All PC-Lock passwords consist of one to sixteen characters (key-
strokes). Any key on your keyboard may be used except the return
key. This allows you to create very obscure passwords. Be sure
that you remember them!

When entering a password to gain access to your computer, just
type the password and then press "return". If you make a
mistake, simply press "return" and re-enter it.

Specific instructions for defining new passwords are displayed on
the screen whenever you need them.


PC-Lock HIGH SECURITY OPTION
PC-Lock HIGH SECURITY OPTION

The High Security option provides a significant additional
security mechanism, and is normally completely invisible to the
user.


RESTRICTIONS
RESTRICTIONS

PC-Lock does not work with VFEATURE. It should not be used if
your hard disk contains partitions belonging to operating systems
other than DOS.


HOW TO INSTALL PC-Lock
HOW TO INSTALL PC-Lock

Before installing PC-Lock it is important that you read the
Warranty Disclaimer shown above. Thank you.

While we have a very high degree of confidence in PC-Lock, it is
impossible to guarantee that any software program will work on
all of the millions of differently configured systems on which it
may be used. For this reason we ask that you ensure you have a
current backup of your hard disk before you install PC-Lock. We
do not anticipate that you will experience any problems in
installing and using PC-Lock, but we do want you to be able to
recover in the unlikely event a problem does occur.

If you have an earlier version of PC-Lock installed on your
computer, please remove it by using the DESTALL utility provided
with that version of PC-Lock.

Installation, described in more detail below, consists of the
following easy steps:

1. Make a copy of your PC-Lock diskette. File the original


PC-Lock Version 2.2B - Page 4







in a safe place and use only the copy. Please use the
DOS "COPY" command. Do not use "DISKCOPY".

2. (Optional) Use the ADMIN utility to place an
administrator password into the INSTALL program.

3. Use the INSTALL program to install PC-Lock and select the
High Security and/or SIDEKICK option(s) as desired.

4. Use the PASSWORD program to define the user password(s)
for each machine. PC-Lock is now installed and ready for
use.

5. (Optional) Select additional features.

6. (Optional) Copy any desired files from the PC-Lock
diskette to the hard disk.


PC-Lock does work with SIDEKICK. If you install PC-Lock by
typing

INSTALL
INSTALL

you will be able to invoke SIDEKICK in the normal manner at all
times, even when your machine is in "Lunch-Break". (The Lunch-
Break feature is described below.) To prevent invocation of
SIDEKICK during Lunch-Break, install PC-Lock by entering

INSTALL /SK
INSTALL /SK

This may, however, cause some other resident programs which use
the system clock to operate improperly. If you need more
information on this point, please contact us.

If you plan to use the lunchbreak feature from within Microsoft
Windows, you must use the "Freeze" option. This causes the
machine to stop processing during lunchbreak. To select this
option you would enter

INSTALL /FZ
INSTALL /FZ

With the above overview in mind we are ready to begin
installation. Please make a backup copy of your PC-Lock diskette
at this time. The next step in the installation process will
alter one of the files on the diskette, so please do make that
backup.

If you only want to protect one computer with a single password,
please skip to the next paragraph. Place your PC-Lock diskette
in drive A: and type "A:ADMIN" and press "Enter", and follow the
directions on the screen. After you have entered and verified

PC-Lock Version 2.2B - Page 5








your administrator password, it will be encrypted and placed in
the file INSTALL.COM on the diskette in drive A:.

Place your PC-LOCK diskette in drive A: of each machine you wish
to protect and enter one of the following lines:

A:INSTALL
A:INSTALL to install PC-Lock,
A:INSTALL /HS
A:INSTALL /HS to select the high security option,
A:INSTALL /SK
A:INSTALL /SK to select the SIDEKICK option,
A:INSTALL /FZ
A:INSTALL /FZ to select the FREEZE option, or

A:INSTALL /HS /SK /FZ
A:INSTALL /HS /SK /FZ to select multiple options.

PC-Lock should tell you that it is correctly installed, and that
your password is PASSWORD. If you have selected the High Security
option, you will re-boot your computer at this time. (Note: If
you used ADMIN to define an administrator password, PASSWORD is
the first of the four possible user passwords.)

Now it is time to define one or more user passwords. Enter
A:PASSWORD. When you are asked to enter your "old" password. You
may enter PASSWORD, or your administrator password. If you enter
PASSWORD, you will be able to change the first user password from
PASSWORD to whatever you wish. If you enter the administrator
password, you may change any or all of the five possible
passwords.

If you have an administrator password, you can cause a different
sequence of AUTOEXEC.BAT commands to be executed for each user.
Please see the description of the WHO utility for full details.

You can also prevent users from breaking out of the batch file.
To do this enter BRK-CNTL OFF/P at the DOS prompt. Please see the
description of the BRK-CNTL utility.

You can prevent users from renaming, deleting, or altering the
CONFIG.SYS, AUTOEXEC.BAT and PC-Lock device driver files. If by
entering HIDE at the DOS prompt. Please see the description of
the HIDE utility.

Finally, copy any desired files from the PC-Lock diskette to
whatever directory on your hard disk you desire. Descriptions of
each file are given below so that you can determine which ones
should be placed on the hard disk. We suggest that only
PASSWORD.COM and possibly WHO.COM be copied to the hard disk.


USING PC-Lock
USING PC-Lock

When your system boots from the hard disk, you will be asked to
enter your password. Any defined password may be entered at this
point. The system will then boot normally. The booting process


PC-Lock Version 2.2B - Page 6







can be further controlled through use of the BRK-CNTL and WHO
programs as described below.

If you wish to protect your computer while it is running, simply
press the shift key on the left side of your keyboard three times
in succession. The screen(s) will then blank, and the keyboard
will lock except for password entry. The computer will continue
with whatever task it was performing when it was locked. The
system may be unlocked by entering either the administrator
password or the password that was used to boot the system. This
feature, known as the "Lunch-Break" feature, may also be
automatically activated whenever the keyboard is idle for a
specified time. Automatic activation is managed via the SET-TIME
utility described below.


Your PC-Lock Files
Your PC-Lock Files

ADMIN.COM
ADMIN.COM Allows you to place an administrator password into
the INSTALL.COM file. This program is described
under "Installing PC-Lock" above.


INSTALL.COM
INSTALL.COM Installs PC-Lock on your computer(s). This
program is described under "Installing PC-Lock"
above.


PASSWORD.COM
PASSWORD.COM Allows a user to change his/her password, and
allows the system administrator to change any or
all of the five possible passwords. To use this
utility, enter PASSWORD at the DOS prompt. You
will be asked to enter your old password.

If a user password is entered you can then change
that password.

If the administrator password is entered, you will
be asked which password you want to change. After
changing it, you will again be asked which
password you wish to change. You may then change
another password, or press the escape key to
return to DOS.

The changes will be in effect immediately except
for unlocking the system during Lunch-Break. The
changes will be effective for all functions after
you re-boot your computer.


UNLOCK.COM
UNLOCK.COM Allows access to the hard disk when booting from a
diskette if you know the administrator password.

PC-Lock Version 2.2B - Page 7







It is included so that you can repair problems on
the hard disk which prevent booting.

For example, if you accidentally destroy
COMMAND.COM, DOS will not allow you to boot from
your hard disk. PC-Lock will not allow you to
boot from a diskette and get to the hard disk to
fix the problem.

To use UNLOCK, boot your computer from a diskette.
Place your PC-Lock diskette in drive A: and enter
"A:UNLOCK". You will then be asked for your
password. If an administrator password has been
defined, only that password will be accepted.
When you enter your password correctly, you will
be informed that PC-Lock protection has been
suspended. Re-boot from your DOS diskette and you
will have access to your hard disk. The next time
you boot from your hard disk, the protection will
be re-instated.


DESTALL.COM
DESTALL.COM Allows you to remove PC-Lock from your computer.
Please DO NOT attempt to remove PC-Lock by simply
deleting its files. Doing so does not work,
though it may appear to.

To use DESTALL enter "DESTALL" at the DOS prompt.
You will be asked to enter your password. If an
administrator password has been defined, only that
password will be accepted. After your password is
entered correctly, you will be informed that PC-
Lock has been removed from your computer.


HIDE.COM
HIDE.COM Hides and protects specified files on your hard
disk from alteration, name change, and deletion.
If you enter:

HIDE

the files, CONFIG.SYS, AUTOEXEC.BAT, and
CLEANDSK.DRV (the PC-Lock device driver) will be
protected. You may also protect other files by
entering:

HIDE filespec

The filespec may contain wild cards. Protection
is not in effect when:



PC-Lock Version 2.2B - Page 8







1. No administrator password has been
assigned, or

2. The last password entered was the
administrator's.


UNHIDE.COM
UNHIDE.COM Reverses the action of HIDE. This utility only
works when protection is not in effect.


LOCK-KB.COM
LOCK-KB.COM Running this program will cause your computer to
immediately go into "lunchbreak". Microsoft
Windows will not allow PC-Lock to watch your
keystrokes. Therefore, hitting three left shifts
from within Windows will not initiate lunchbreak.
LOCK-KB may be executed as a substitute method of
initiating the lunchbreak feature.


LOCK-KB.PIF
LOCK-KB.PIF This is a standard Microsoft Windows PIF file for
use with LOCK-BK.COM. If you are not using
Windows you do not need either LOCK-KB file.


BRK-CNTL.COM
BRK-CNTL.COM Allows the system administrator to prevent a user
from breaking out of the AUTOEXEC.BAT file during
system boot. (The system administrator can always
break out.)

This may be accomplished by entering:

BRK-CNTL OFF/P

at the DOS prompt. "OFF" means that keyboard
Ctrl-Break and Ctrl-C are to be disabled. (No
breaks allowed.) The /P means that the change is
to be made permanent. Each time the system is
booted, keyboard break will not work until
explicitly turned on. This may be done by placing
the following command at an appropriate point in
the AUTOEXEC.bat file:

BRK-CNTL ON

"ON" means that keyboard breaks are to be enabled.
Since "/P" was not included, the change is not
permanent. Breaks will again be disabled when the
system is re-booted or a "BRK-CNTL OFF" command is
used.



PC-Lock Version 2.2B - Page 9







The /P option will not work while HIDE is in
effect. (See description of HIDE.COM above.)

WHO.COM
WHO.COM Allows the system administrator to have the
AUTOEXEC.BAT file do different things when
different users boot the system. The WHO program
may be used by structuring your AUTOEXEC file as
follows:

.
.
commands common to all users
.
.
WHO
IF ERRORLEVEL==4 GOTO USER4
IF ERRORLEVEL==3 GOTO USER3
IF ERRORLEVEL==2 GOTO USER2
IF ERRORLEVEL==1 GOTO USER1
.
.
commands to be executed when the
administrator's password was used.
.
.
GOTO COMMON
:USER1
.
.
commands for user 1
.
.
GOTO COMMON
:USER2
.
.
commands for user 2
.
.

.
.
GOTO COMMON
etc. for users 3 and 4
.
.
:COMMON
.
.
commands common to all users



PC-Lock Version 2.2B - Page 10







For more information in the use of "IF" statements
and "ERRORLEVEL" within batch files, see your DOS
reference manual's section on BATCH commands.


SET-TIME.COM
SET-TIME.COM Overcomes problems caused by certain resident
programs which are not well behaved, as well as
activating the Lunch-break feature (see "Using PC-
Lock" above) whenever the keyboard has been idle
for a specified period.

There are a few resident programs which will
prevent PC-Lock from recognizing that the leftmost
shift key has been pressed three consecutive
times.

If this problem occurs, the SET-TIME program
should solve the problem. Simply place SET-TIME
in the AUTOEXEC.BAT file, or enter it at the DOS
prompt as the last resident utility, or at least
after the offending resident program.
If you would like to automatically activate the
Lunch-Break feature whenever the keyboard has been
idle for a specified number of minutes, you may
enter:

SET-TIME time

where "time" is the time in minutes. The maximum
allowed value of "time" is 60. For example, if
you wish to activate the Lunch-Break feature
anytime no keys have been depressed for seven
minutes you would use:

SET-TIME 7

If "time" is zero, or is not given, the Lunch-
Break feature is never automatically activated.
Either of the following two commands will prevent
automatic activation:

SET-TIME
SET-TIME 0

ORIGDISK.COM
ORIGDISK.COM Prior to DOS 3.3, DOS provided no support for
disks larger that 32 megabytes, and there were no
rules as to how such support should be provided.
This forced each vendor of large hard disks to
design its own method. While it is not possible
to design PC-Lock to work correctly with all of
these, it does work with DOS 3.3 and almost all
large hard disk systems except VFEATURE.

PC-Lock Version 2.2B - Page 11








If PC-Lock will not work on a particular system it
will usually not install at all and tell you that
it is incompatible. If it does install, but does
not work, the DESTALL program will remove PC-Lock
from your computer and should restore it to
working condition. We say "should" because we
have found one hard disk system (no longer
published) for which DESTALL would not completely
restore your hard disk. Entering ORIGDISK at the
DOS prompt will completely restore any hard disk
system to its original condition. You should
never need to use ORIGDISK, but it is included in
case you do.







































PC-Lock Version 2.2B - Page 12







How to Order PC-Lock 2.2
How to Order PC-Lock 2.2

PC-Lock may be ordered from: Johnson Computer Systems, Inc.
20 Dinwiddie Place
Newport News, VA 23602
(804) 872-9583

We accept:
Your personal or company check with your order,
Money Orders,
Purchase orders over $50.00 (Net 30 days),
VISA or MasterCard, and
COD orders.

If you send a check or money order which is not payable through a
US bank, please add $5.00. This is what our bank charges us.

Orders are generally shipped within one working day. COD orders
may be slightly slower.

The price of PC-Lock consists of the following:

1. A license fee which is dependent on the number of
computers on which you wish to have PC-Lock
concurrently installed:

No. of Concurrent License Fee Per Fee for Upgrade
Installations Installation from version 1.X

1 - 5 26.00* 11.00*
6 - 15 22.50 9.50
16 - 99 19.00 7.50
100 - 999 15.00 6.00
1000 - Up 12.50 4.00

2. A media fee of $4.00 for each PC-Lock diskette you wish
us to ship to you. You only need to buy one diskette,
but we will be glad to ship as many as you wish.

We pay shipping via First-Class mail to the United States and
Canada. Others add $2.50 per diskette for first class air-mail.
Add actual shipping costs for other carriers and/or COD orders.

We will refund your full purchase price if PC-Lock 2.2 does not
perform to YOUR expectations and you:

1. Write to us within 30 days stating that PC-LOCK does
not meet your expectations and that you will no longer
have PC-Lock installed, and

2. Enclose the label(s) from your original PC-Lock
diskette(s).

PC-Lock Version 2.2B - Page 13








PC-Lock Version 2.2 Order Form

To: Johnson Computer Systems, Inc.
20 Dinwiddie Place
Newport News, VA 23602
(804) 872-9583

Please accept our order for PC-Lock version 2.2 as indicated
below:


Fee for ____ concurrent installations at _______ each $_________


____ PC-Lock diskette(s) at $4.00 each _________


Shipping charge (See preceding page.) _________


Invoice fee (Orders below $50 which require an invoice) _________


Virginia State Sales Tax (Ship/Bill address in VA) _________


Total Order _________




Purchase Order _________________________ Date __________________

Company Name ____________________________________________________

Attention _______________________________________________________

Dept./Mail Stop _________________________________________________

City, State, Zip ________________________________________________

Phone: Daytime ____________________ Evening ____________________
(In case we have a question about your order.)



Credit card: VISA MasterCard Choice (Circle one)

Name on Card ___________________________________________________

Card Number ______________________________ Expires: ___________

PC-Lock Version 2.2B - Page 14



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