Working with multiple computers on a single desk—such as a personal desktop workstation and an employer-issued laptop—often clutters workspace with redundant peripherals. Constantly shifting your hands between two keyboards, juggling separate mice, or investing in expensive hardware KVM switches creates needless friction. While multi-monitor display adapters allow you to extend a single PC’s video output, they do not help when you must operate two independent Windows machines simultaneously.
Microsoft eliminates this barrier with Mouse Without Borders, integrated directly into Microsoft PowerToys. Operating seamlessly over your local Wi-Fi or Ethernet network, Mouse Without Borders allows you to control up to four distinct Windows computers using a single mouse and physical keyboard. You can glide the cursor across monitor boundaries, copy text on one machine and paste it on another, and drag and drop files across systems. In this guide, we explore how to install PowerToys, link machines securely with encryption keys, configure monitor layouts, and troubleshoot connectivity.
How Mouse Without Borders Works Over Local Networks
Mouse Without Borders creates a lightweight encrypted network tunnel between your computers, coordinating input events and clipboard caches:
| Capability | Function | Everyday Advantage | Network Requirement |
|---|---|---|---|
| Seamless Cursor Flow | Transitions mouse pointer across screen edges | Eliminates manual hardware switching | Same Local Area Network (Wi-Fi or LAN) |
| Shared Clipboard | Copies text, URLs, and images across PCs | Paste research links directly into secondary PC | TCP port 15100–15101 open locally |
| File Drag & Drop | Transfers documents by dragging past monitor edge | Instant file sharing without USB thumb drives | Write access to user desktop/downloads |
| Unified Lock | Locks all paired computers simultaneously | Step away from desk and lock entire setup | Shortcut: Win + L or custom key |
To ensure background file transfers and multi-machine sync sessions are not disrupted by aggressive sleep timers, you can also use PowerToys Awake in Windows 11 to keep your secondary computer awake indefinitely.
Step-by-Step Tutorial: Installing and Pairing Windows 11 Machines
Before pairing, ensure both computers are connected to the same local Wi-Fi router or Ethernet switch and have Microsoft PowerToys installed:
- Open the Microsoft Store on both PCs, search for Microsoft PowerToys, and click Install (or run
winget install Microsoft.PowerToysin Windows Terminal). - Launch PowerToys on your primary PC (the machine whose keyboard and mouse you want to use).
- In the left sidebar, click Mouse Without Borders and toggle the switch to Enable Mouse Without Borders.
- On your primary computer, locate the Encryption key and Device name under the Connect section (or click Generate new key).
- Now switch to your secondary computer, launch PowerToys, enable Mouse Without Borders, and click Connect.
- Type the exact Security Key and PC Name generated by your primary machine, then click Connect.
- Within a few seconds, the connection status on both systems will display Connected with green status icons.
Arranging Monitor Order and Display Layouts
To ensure your mouse pointer moves naturally from left to right or top to bottom across physical desks:
- In the PowerToys Mouse Without Borders settings panel on your primary PC, look at the visual computer grid.
- Click and drag the computer icon thumbnails so their horizontal or vertical arrangement matches the actual placement of your physical monitors on your desk.
- Click Apply to save the arrangement.
- Move your cursor to the edge of your primary screen; it will seamlessly glide onto the desktop of your second computer. Any keystrokes you type will automatically target whichever machine currently holds the cursor.
Configuring Shared Clipboard and Drag-and-Drop Transfers
Fine-tune input settings to suit your workflow preferences:
- In the Behavior section, ensure Share Clipboard is toggled on. This enables cross-device copy and paste: press
Ctrl + Con your primary laptop, move the cursor over to your secondary PC, and pressCtrl + V. - To transfer a spreadsheet or document between machines, simply click and drag the file icon toward the physical boundary of your secondary screen. Mouse Without Borders places the received file into a dedicated MouseWithoutBorders folder on your desktop.
- If you frequently transfer large files over local wireless links, you can also set up and use Quick Share in Windows 11 for multi-gigabyte media packages.
Troubleshooting Connection Drops and Firewall Restrictions
If the secondary computer fails to link or cursor movement stutters:
- Check Windows Defender Firewall: Ensure PowerToys is permitted through private network firewalls. Navigate to Settings > Privacy & security > Windows Security > Firewall & network protection > Allow an app through firewall and verify PowerToys is checked for Private networks.
- Verify Network Profile: Ensure your Wi-Fi network is marked as Private network in Windows Settings on both devices rather than Public network, which restricts local peer communication.
- Disable VPNs on Local Subnets: If you use enterprise VPN software, ensure local LAN bypass is enabled so local broadcast packets are not funnelled through remote company gateways.
Frequently Asked Questions
Does Mouse Without Borders require an internet connection?
No. Mouse Without Borders communicates entirely across your local home or office network using encrypted TCP sockets. It does not send keystrokes, clipboard content, or mouse movements through external cloud servers.
Can I pair a Windows 11 laptop with a Windows 10 desktop?
Yes. As long as both machines run compatible versions of Microsoft PowerToys, you can pair Windows 11 and Windows 10 machines seamlessly.
Can I disable mouse jumping when playing full-screen PC games?
Yes. Under the Behavior settings, you can check Block mouse at screen corners or set a custom shortcut (such as pressing Ctrl three times) to lock the cursor onto a single monitor during gaming sessions.