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Secure your workstation or server with Password Protection while viewing programs that are running in the background.

For Windows XP/2003/Vista/2008/7/8/2012/10/11

Product Description:

Transparent Screen Lock enables IT professionals to prevent unauthorized system access, while maintaining the ability to view applications running on the desktop for monitoring purposes.

Transparent Screen Lock delivers system security measures that are essential in today's open-concept corporate offices with free movement of employees and visitors, as well as in high security environments such as financial institutions and banks, hospitals and pharmaceutical research facilities, government offices and military installations.

With its ability to limit system access to authorized individuals in both stand-alone and multiple-user shared computer environments, Transparent Screen Lock is ideal for facilities which must ensure compliance to the 21 CFR Part 11 code of federal regulations.

Now Available!We offer four versions of the software: TSL-PRO (with password authentication), TSL-SC (with Smart Card support), TSL-RFID (with RFID card support), TSL-BIO (with Biometric fingerprint authentication). Choose the authentication method that is best for you.

Now Available! With optional support for a hardware proximity sensor, Transparent Screen Lock delivers maximum security by automatically locking the system when the user steps away from the station. when the user approaches the system, TSL's password-protected logon screen is automatically displayed.

5 Software Versions to choose from, and Free 7-day Trial Downloads:

We offer 5 versions of the software: choose the authentication method that is best for you.
We are happy to offer free 7-day trial versions for all of our software products:
Lastest Downloads
  • Enter a password to unlock the system.
  • Enter the user's Window's logon credentials, or a set password.

Download free 7-day trial version here:

  • Unlock the system using a Windows-compatible Smart Card, or the user's Window's logon credentials, or a set password.
  • The system can be locked after a configured idle time or removal of the Smart Card

Download free 7-day trial version here:

  • Unlock the system using an RFID Card, or the user's Window's logon credentials, or a set password.
  • Supports dual-factor authentication: requiring BOTH the RFID card AND the password to be entered in order to access the system.
  • We support RFID cards from RFIdeas

Download free 7-day trial version here:

  • Authenticate users using a biometric fingerprint scanner.
  • Fingerprint scanners may be stand-alone devices ("hamster"), or built-into a mouse or keyboard.
  • We support fingerprint scanners from Secugen, including the "Plus" and "IV" series.

Download free 7-day trial version here:

  • The latest edition to the TSL family - Transparent Screen Lock SMART
  • Authenticate users using Text Passwords, Microsoft Accounts, Smart Cards, as well as Windows Hello that includes Fingerprint and Face Detection.
  • Supports stand alone systems as well as Active Directory and Azure Domains.
  • Supports Common Access Cards (CAC) used by the United States Department of Defense.
  • Configure remotely using Group Policy Objects.

Download free 7-day trial 64 bit version here:

Download free 7-day trial 32-bit version here:

Proximity Sensor hardware option. With optional support for a hardware proximity sensor, TSL delivers maximum security by automatically locking the system when the user steps away from the station. When the user approaches the system, TSL's password-protected logon screen is automatically displayed.

Includes an option to automatically enable the "Lock Now" feature, and immediately secure the system, in the event that the "Proximity Sensor for TSL" is accidentally disconnected from the computer's USB port.

  Click here for Proximity Sensor details and hardware specifications.

Software Pricing:

Single-copy or Volume User Licenses of "Transparent Screen Lock" are available:

Number of licenses "TSL-PRO" "TSL-SC, "TSL-RFID" or "TSL-BIO"
Quantity 1-9 $49.95 each $74.95 each
Quantity 10-49 $44.95 each $67.45 each
Quantity 50+ $42.45 each $63.70 each
  Purchase TSL-PRO Now Purchase TSL-SC Now
Purchase TSL-RFID Now
Purchase TSL-BIO Now

Please contact
for higher volume quotations.


 Features of "Transparent Screen Lock" software:

    Feature List:
  Password Protection (see authentication options above)
  Grant access to Administrator/other authenticated users
  Grant access to specified "User Groups" (local or global)
  Ease of configuration for multi-user shared computer system
  Control usage of Ctrl-Alt-Del
  Completely block Ctrl-Alt-Del key sequence
  Remove process from Task Manager
  Shutdown/Logoff after X number of invalid logons
  Option for only Administrator to configure program
  Log File saved locally or on network
  Log File saved to Application Event Log
  Quick-launch icon
  Lock system after preset time interval
  Blank screen when locked
  Dim screen when locked
  Clear desktop icons/task bar
  Multiple-monitor support
  User-friendly setup program
  Standard Windows Screensaver Module
  Remote Desktop Terminal Server support
  Onscreen Keyboard for tablet support
  Supports Windows XP/2003/Vista/2008/7/8/10; 32 and 64 bit
  Proximity Sensor hardware option
(Automatically locks the system when the user walks away)
  • Password Protection. Any attempts to access your workstation or server while TSL is running (by typing a key or moving the mouse) require a valid username and password to be entered. If no password is entered, the password dialog box will disappear after 5 seconds. Options include:
    - USE SYSTEM LOGON PASSWORD: The software will expect the user to type in their logon password - the same password that is used to log on to their account. NOTE: This is the default option.
    - CONFIGURE WITH NEW PASSWORD: You may also choose to enter a different password manually via the configuration program.
    - Added support for alternate characters on international keyboards in the password.

  • Grant access to other users. Ideal for multiple-user shared computer environments. Enables an adminstrator, a specified group of users, and/or other authenticated users to access the system without closing the current session. Options include:
    - accept current user's password only,
    - accept users with Administrative Privileges,
    - accept any valid username/password combination in the facility,
    - accept members of a specified "User Group" (local or global).
    - New "unlock dialog" configuration tab provides additional control over how the password dialog box is displayed, including options to automatically populate the username field, restrict access to users of one domain only, and configure a timeout value.

  • Simplified program configuration in a multiple-user shared computer environment.
    An Administrator can install the program once, and the program and associated icons will automatically be available on the desktop of all users sharing the computer.
    - Make program settings on a per-user basis or on a system/machine basis. This time-savings feature enables an administrator to makde configuration changes once, and have them applied to all users of that system.

  • TSL Screensaver Module. Allows you to select Transparent Screen Lock from the "Screensaver" Tab of the "Display Properites" applet.  Active Directory users can enforce the use of TSL by selecting Transparent Screen Lock.scr as the current screensaver using Group Policy.

  • Remote Administration. Setup program includes an Administrative Template (tsl.adm) that can be read by your GPO Editor to manage all of TSL's settings remotely.

  • Terminal Server Support. Allow users to view a remote desktop but disallow any interaction with the remote system.

  • Control usage of CRTL-ALT-DEL. Choose to disable any or all of the CRTL-ALT-DEL menu options to prevent tampering with the system.

  • Completely block the CRTL-ALT-DEL key sequence. In selecting this option, no menu will be displayed if the user hits CRTL-ALT-DEL.

  • Option to remove Process from the Windows Task Manager. Prevent users from disabling the program.

  • Option to shutdown system or Logoff current user after a specified number of invalid logon attempts. Provides attitional system security.

  • Administratove Control. Choose to allow only a user with full Administrative Privileges to access the configuration program.

  • Log File. Create a log file to document activity and logon attempts.
    - Document the time and date of when TSL was active/inactive.
    - Provide a list of invalid login attempts, with details of the attempted passwords.
    - The log file may be saved either locally, at a remote network location, or
    - For maximum security, save the log file to the Windows Application Event Log.

  • Run the Transparent Screen Lock program at any time, or configure with a time-out interval.
    - Run TSL automatically at a preset time interval like a screensaver

    - Or, run TSL immediately by clicking on the quick-launch icon in the Windows Tool Tray:

  • Quick Launch Option.

  • Blank Screen Option. Choose to display a blank screen when the system is locked, rather than viewing programs running on the desktop. (Ideal for preventing unauthorized system access, in a stand-alone or multi-user environment with all the features listed here, while preventing the display of confidential information.)

  • Dim Screen Option. Control the amount of opacity of the display when the system is locked. Enter an integer between 0 (completely transparent) and 100 (black display). NOTE: This option is available for Windows 2000/XP/2003, and not for NT.

  • Plasma Screen Saver Option. A black bar of variable width floats across the screen preventing Plasma Screen Burn-In.  This option allows TSL to be used as a Plasma Screensaver.

  • Clear Desktop Option. Remove icons and task bar from desktop display when locked.

  • Multi-Monitor Support. Run the program in a dual or multi-monitor environment.

  • User-friendly setup program. Includes various user-friendly features, including embedded context-sensitive help file, tip of the day upon startup, and keyboard shortcuts for mouseless operation.


Who Needs "Transparent Screen Lock" ?

Anyone who needs to Password Protect access to their workstation or server.

TSL provides a secure password mechanism for Win2k/XP/2003/Vista - and runs "transparently" - so you can still monitor the programs that are running. This is ideal for:

  • System Administrators:control access to single-user or multi-user systems in a corporate environment.

  • Labs and Production Floors: monitor processes while maintaining access control: 'see, but do not touch'.

  • Retail Stores, Kiosks, Tradeshow Demos: prevent unauthorized access.

  • Home users: parents can control a child's computer time; email or instant message users can monitor incoming messages, while restricting access to your computer.

    Our Customers:

    Our customers include: Banks & Financial Institutions, Hospitals & Pharmaceutical companies, Schools, Government & Military Installations, and various other companies.

    Please click here for a partial list of our customers.

Old Versions of the software

We are happy to offer our customers free software maintenance upgrades within each major release (eg: all maintenance releases within v5.xx, or v6.xx).

If you own an old version but have misplaced the file, or if you need to downgrade your software, please contact us.

Software Upgrades:



System Requirements

  • WinXP, Windows Server 2003/2008/2012, Vista, 7, 8 or 10/11 (32 or 64 bit)
  • 3MB of free disk space
  • 16MB of RAM

Screen Shots

"Transparent Screen Lock" is simple to install and launch, and will enable you to see-through to the applications that are running. Please see the following screenshots:

Transparent Screen Lock PRO: 


For Technical support:

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