ConfineMouse is a classic, lightweight, freeware utility created by the developer Skrommel as part of “Skrommel’s One Hour Software”. Built using AutoHotkey, it is designed for multi-monitor users—especially gamers and heavy workflow professionals—who need to lock the mouse cursor onto a single monitor screen to prevent it from accidentally drifting onto a secondary display. How to Use ConfineMouse
Using ConfineMouse is highly straightforward since it features no complex configuration menus.
Download and Run: Download the utility executable from a trusted repository like DC Members (DonationCoder).
Launch the Utility: Double-click the ConfineMouse.exe file. It will immediately run and place a tiny icon in your Windows system tray (bottom-right corner of the taskbar).
Locking the Cursor: By default, the tool activates automatically upon launch, trapping your cursor within the bounds of the primary screen or the monitor it was active on. Toggling the Lock (Disable/Enable):
Hot key: Press Ctrl + D on your keyboard to instantly disable the confinement and allow free movement across screens. Pressing it again re-enables it.
Mouse click: Double-click the system tray icon to instantly toggle the tool on and off.
Automation: If you want the tool to remain active every time you boot up your computer, right-click the tray icon and look for a startup option, or manually drag a shortcut of the EXE file into your Windows Startup folder. Key Capabilities and Limitations
Simplicity: It does not require a bulky software suite installation and uses negligible system resources.
The “Pass-Thru” Lag: Because it relies on basic script tracking, the cursor may sometimes visually cross over to the second monitor by a few pixels before the program hooks it and forces it back to the main screen.
Focus Issues: If a fullscreen game loses focus, the script may temporarily stop tracking until you focus on the correct window again. Alternative Solutions for Cursor Locking
If ConfineMouse is too barebones or experiences edge-case clipping on modern operating systems, several robust alternatives achieve the exact same goal: 1. Dual Monitor Tools (DMT)
DMT is the most popular open-source utility for this specific problem.
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