
OVERVIEW
--------
	UZBlank is a screen blanking program designed specifically for
power-managed laptop computers running MS Windows 3.x, although it can
also be used with desktop systems.  In contrast to existing screen
savers, whose main purpose is to save the screen pixels from wearing
out, and to provide some entertainment value, UZBlank's purpose is to
save power on the laptop, by blanking the screen when it has been idle
for a configurable period of time.  It has been designed to be at least
as good as the default MS Windows screen saver. There are several
features of UZBlank which distinguish it from other screen savers:

- UZBlank uses the Advanced Power Management (APM) features of modern
  laptop computers to power off devices (eg. the display) when running
  in battery-operated mode, in order to save power. Since APM is still
  fairly recent, not all laptops have the most powerful APM features.
  UZBlank will try the most power-efficient strategy for your system.

- UZBlank does not waste CPU cycles (which consume power!) when
  operating in battery-operated mode. It does not display any fancy
  graphics, because they also waste display power.

- UZBlank incorporates password-protected screen locking functionality
  which automatically locks the screen after a selectable amount of time
  after blanking or being suspended (partially powered off), or always on
  resume. This prevents other people from seeing your data, if you are
  forced to leave your laptop in unsecured areas. In addition, if your
  laptop has password protection at the ROM BIOS level, there is
  effectively no way to access the computer short of dismantling it
  (draining the battery does not help if your ROM BIOS password is in
  NVRAM!). This thwarts casual unwanted access at your data by other
  people.

- UZBlank has a more insensitive mouse unblanking mechanism, for those
  (frequent) situations where the laptop is being moved around (as in
  an airplane, train, etc).

INSTALLATION
------------
	There are many ways to install UZBlank, and one simple alternative
is to follow these instructions:

1) Make a separate directory (using mkdir from the DOS prompt) and copy
   the files from your distribution medium (either extract it from a
   downloaded archive file (PKZIP, LHARC, ZOO, ...), or copy from the
   diskette) into that directory.  It is highly recommended to install
   into a newly created directory, so that you can easily upgrade or
   uninstall later.

   NOTE: if you have a previous version of UZBlank, we still recommend
   installing into a new directory. For example, if you named the old
   directory UZBLANK, you can rename it to UZBLANK.OLD. After having
   installed the new software, copy the old license file (eg.
   UZBLANK.OLD\UZBLANK.LIC ) to the freshly installed directory.
   This will save you the time (and cost!) of reregistering the software.

2) if you have not done so already, create a new program item in the
   "Startup" program group, so that UZBlank starts running when Windows
   starts. You can do this in the Program Manager either by

   a) dragging the "UZBlank" executable file from the File Manager into
      the "Startup" program group (consult your Windows manual);
   or by
   a) restoring the "Startup" program group (for example, by double-clicking
      on its icon). If you do not have a "Startup" program group, you can
      add the the new program to any of the other program groups; and
   b) choosing the "File" and "New..." menu entry of the Program Manager.
      Choose "Program item" and hit "OK".  Set its "Description" to
      "UZBlank", its "Command Line" to "uzblank" and its working directory
      to the directory where you installed the UZBlank files. When you are
      done, the "UZBlank" icon should be in the currently selected program
      group.

3) disable any existing screen savers (including any previous version of
   UZBlank), either through the Desktop icon in the Control Panel (set
   the "Screensaver" item to "None"), or explicitely by closing them. If
   you start your other screensaver (for example, IdleWild) from
   WIN.INI, you'll have to disable it by using the System Editor to
   remove it from the "load=" line.

4) double-click on the UZBlank icon, or restart Windows (to verify that
   it works).  UZBlank is started when its icon shows at the bottom of
   the desktop.

	To uninstall UZBlank in the event you are not going to use it,
simply reverse the steps above, that is:

1) stop running the UZBlank program.

2) remove the program item from any program group that you added it to.

3) remove the files from the directory where you copied them to.

4) reenable the old screen saver, if you had one.


USAGE
-----
	UZBlank runs purely as an icon, with 3 additional menu options
in its System menu. These options are displayed and selectable when you
single-click the left mouse button on its (running) icon.

- The "About" menu option displays version and licensing information.

- The "Settings" option allows to configure several parameters:

	- "Blank time"
	  specifies the number of minutes of inactivity after which
	  UZBlank will blank the screen. This is merely an indication to
	  the user that the system has been idle for a while.

	  On any input (mouse or keyboard), the original display is
	  immediately restored, unless the screen has been locked as
	  described below.

	  The recommended setting is 1 minute.

	- "Display standby time"
	  specifies the number of minutes of idleness that UZBlank will
	  try to power manage the display.  If your laptop is capable,
	  then (only) the display will be powered off (to conserve
	  battery life).

	  On any input (mouse or keyboard), the original display is
	  immediately restored, unless the screen has been locked as
	  described below.

	  The recommended setting is 2 minutes.

	- "Global suspend time"
	  specifies the number of minutes of idleness until UZBlank will
	  suspend the entire system, but ONLY IF it is currently running
	  on battery power. In this mode, the laptop uses the least
	  amount of power, and you are able to (almost) instantaneously
	  power it up. This is equivalent to you pressing the "Suspend"
	  button on your laptop (or equivalent, please read your
	  manual), and no programs will run in this condition.

	  You can resume by hitting the "Restore" button (if your system
	  has one, or the "Suspend" button again), and the original
	  display is restored, unless the screen has been locked as
	  described below.

	  The recommended setting is 3 minutes, unless you often run
	  programs unattended while on battery power, in which case you
	  want to make this number bigger.

	- "Unblank on Mouse Move"
	  allows you to select whether to restore the blanked screen
	  with the mouse or not. Even though UZBlank already has an
	  insensitive mouse unblanking mechanism, you may want to
	  disable this if your mouse still is sensitive, or you are
	  using your computer in an environment that make you move the
	  mouse inadvertently.

	  The recommended setting is to select this item.

	- "Password >>" 
	  pressing this button brings up the Password Locking options
	  described below.

	- "Lock time"
	  specifies the number of minutes of idleness until UZBlank will
	  lock the screen. You will be forced to enter a password if you
	  want to access your screen. This feature is also enabled if
	  your computer has been suspended for the specified amount of
	  time (regardless or not whether it was idle at the time of
	  being suspended).

	  You can resume by entering the password.  The only other way
	  to get into the system is by powering it off. If your laptop
	  has a ROM BIOS password (as most do nowadays), your system
	  can only be accessed by someone knowlegeable dismantling it.
	  If you are concerned, contact your laptop vendor and get the
	  details!

	  The recommended setting is 60 minutes, unless you operate in
	  an unsecure environment, in which case you want to make this
	  smaller.

	- "Password"
	  and "Verify password" text items allow you to select your
	  password. You will have to type the same password in both
	  fields.

	  UZBlank will not lock the screen, if you have not set your
	  password!

	  We recommend that you select the same password as your ROM
	  BIOS password, or choose another well-remembered, yet not
	  easily guessed-at string. If you ever forget your password,
	  you'll have to turn off the computer, and reset it again.

	  NOTE: be careful about your "Caps Lock" key, as the password
	        is case-sensitive.

	- "Lock on Resume"
	  this option enforces password locking on every resume from
	  suspended mode, regardless of the other parameters. Use this
	  if you are in a very unsecure environment.

	  The recommended setting is off.

- The "Lock now" menu option allows you to lock the screen immediately.
You can use this if you expect to be away from your computer and don't
want people looking at your data.

LIMITATIONS
-----------
	Due to "features" of the Windows environment, UZBlank has the
following limitations:

- it will not blank if a window of the class "tty" is active, such as
  any Non-Windows Application in a Program Manager program item. This
  is the same behaviour as the default Windows screen saver mechanism,
  but we are working on it.
  NOTE: the password locking feature will work on power-up from the
  suspended state regardless of whether a Non-Windows application is
  active in "windowed" mode.

- it will not control the system while a Non-Windows Application is
  running in "Full-Screen mode". In particular, the password-locking
  feature will not work while the full-screen application is running.
  We recommend to run Non-Windows Applications in "Windowed" mode, as
  controlled through the PIF Editor application.

- the (malicious) intruder can always power off the system, so if your
  PC does not have a boot-time password, UZBlank only prevents casual
  access at the data (ie. without you knowing it). If your boot-time
  password lives in memory powered by the battery, the intruder will be
  forced to drain the battery (either wait a long time, or dismantle the
  PC; I am purposefully omitting details here) If you care about this,
  ask your PC vendor to give you decent protection for your PC with a
  boot-time password in NVRAM!

SUPPORT
-------
	If you are a registered user, UZful Software provides on-line
support via e-mail at  uzful@mv.mv.com . When you report a problem,
please include
- the version of UZBlank that you are running,
- the type of PC you have, and
- the symptoms of the problem (any special circumstances that make
  the problem appear? How often does it occur? Can you reproduce the
  problem?).  The more info you provide, the quicker we can fix it.

If you have additional suggestions on how to make the program even more
useful, please drop us a line.

UZful Software
"We make the useful simple."

