Transparent Lock Screen

Transparent Lock Screen is a Windows application that replaces the system lock screen with a transparent overlay. It allows you to see the desktop and running applications while the computer remains locked and protected against unauthorized interactions. The software intercepts the standard Windows lock command.

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• Standard Transparent Lock. Replaces the native Windows lock screen with a transparent visual overlay. When locking via Windows Key + L or the Start menu, the user sees the unaltered desktop. The system blocks all interaction with the underlying elements.
• Inactivity Lock. Setting to automatically activate the transparent lock mode after a user-defined period of keyboard and mouse inactivity. The function monitors device input and applies the lock without manual intervention, suitable for environments with immediate privacy requirements.
• Custom Activation Methods. Implementation of alternative methods to initiate the transparent lock. Includes assigning a custom key combination (hotkey) and execution via command line (CMD) or scripts. Provides flexibility to integrate locking into automated workflows.
• Ctrl+Alt+Del Protection. Ability to intercept and handle the Ctrl+Alt+Del key sequence during the locked state. Can be configured to ignore the command or redirect it to the Windows credential manager, maintaining security even against access attempts with system privileges.
• Input Device Locking. Interception and suppression of input events from hardware. Blocks all mouse clicks and movements, as well as key presses from physical or virtual keyboards. This function prevents manipulation of applications and windows visible under the transparent layer.
• Configurable Unlock Mechanism. Definition of the action required to deactivate the transparent lock. Options include: clicking the mouse, moving the mouse, pressing any key, using the Ctrl+Alt+Del combination, or entering a custom key combination. Each method prompts for Windows authentication credentials.
• Mouse Pointer Hiding. Function that makes the mouse cursor invisible during the transparent lock period. Removes the visual indicator of the cursor position, reinforcing the appearance of an inactive system and preventing distractions over the visible desktop content.
• System Sleep Prevention. Setting to inhibit Windows power-saving modes while the transparent lock is active. Keeps the screen on and prevents the system from entering hibernation or sleep, simulating user activity for monitors with auto-shutdown policies.
• Event Logging. System for recording lock and unlock related activities. Saves timestamps and the event type to a plain text file on the local disk or to the Windows Event Log. Facilitates access auditing and diagnostics.
• Integration with Windows Authentication Methods. Full compatibility with all operating system credential providers. Upon unlock request, the standard Windows interface for password, PIN, facial recognition, fingerprint, or Windows Hello is displayed. Authentication security is managed by the operating system.
• Revert to Standard Lock. Programmable behavior if unlock credentials are not completed within a time limit. Transparent Lock Screen can automatically restore the traditional Windows lock screen after a period of inactivity in the authentication dialog, as an additional security layer.
• Continuous Monitoring Mode. Specific use case to allow passive viewing of content on the locked desktop. Example: continuous playback of a video or presentation while controls are locked, preventing interruption or modification of the content by observers.

The development of Transparent Lock Screen began in 2016 by the company Softros. The company's programmers, specialists in utilities for Windows systems, created the application using the C++ programming language and native Windows APIs (WinAPI). The development approach focused on low-level interception of Windows session and security mechanisms to create an alternative locking solution without compromising the base security of the system.

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