Control Up to Four Windows PCs with One Keyboard and Mouse Using PowerToys

Unlike Remote Desktop, this does not place one PC’s screen inside another. Each computer continues to run its own desktop, applications, monitors, and user session. Mouse Without Borders simply lets the pointer cross from one machine to the next as if the computers were unusually well-behaved extended displays. It can also share clipboard contents and transfer individual files between connected PCs.

The tool works on supported Windows 10 and Windows 11 systems, provided each PC can run the current PowerToys release. Microsoft’s documented baseline is Windows 10 version 2004 (build 19041) or later, or Windows 11, on x64 or ARM64 hardware.

What You Need Before You Start​

Gather the basics before beginning:

• Up to four Windows 10 or Windows 11 PCs
• PowerToys installed on every PC you want to control
• All computers connected to the same trusted local network
• An account with permission to install software and, if needed, approve firewall prompts
• The computer names for the devices you are pairing

For a home or office desk setup, wired Ethernet is usually the least fussy option. Wi-Fi can work perfectly well, but it adds another variable when connections are unstable—because networking has never met a simple desk arrangement it could not complicate slightly.

Mouse Without Borders is designed for local-network use. Do not treat it as a way to control a computer across the public internet, and avoid pairing PCs on hotel, café, guest, or otherwise untrusted networks.

Install PowerToys on Each Computer​

Install Microsoft PowerToys on every participating machine. The Microsoft Store and the official PowerToys installer are straightforward choices. IT users can also install it from an elevated Terminal or PowerShell window with Windows Package Manager:

winget install --id Microsoft.PowerToys --source winget

Once installed:

1. Open PowerToys on each PC.
2. Select Mouse Without Borders in the left-side settings list.
3. Turn on Enable Mouse Without Borders if it is not already enabled.
4. Leave the settings window open on the first PC; this will be the initial machine used to create the pairing key.

For the smoothest experience, update PowerToys on all connected PCs before pairing them. Matching versions are not an absolute guarantee against every quirk, but it removes a very avoidable source of trouble.

Pair the First Two PCs Securely​

Mouse Without Borders pairs computers with a security key and the host name of an existing connected computer.

On the first PC​

1. Open PowerToys Settings.
2. Select Mouse Without Borders.
3. Under the setup area, choose New Key.
4. PowerToys creates a security key. Keep this key private and available long enough to enter it on the second PC.

Generating a new key resets current Mouse Without Borders connections, so do not use it casually after building a working multi-PC arrangement.

On the second PC​

1. Open PowerToys Settings and select Mouse Without Borders.
2. Enter the security key generated on the first PC.
3. Enter the local machine host name of the first PC exactly as shown in its Mouse Without Borders settings.
4. Select Connect.

When the connection succeeds, both computers should appear in the device layout. A green connection indicator means the link is active. If PowerToys shows red, orange, yellow, or another status color, the computers are still resolving, connecting, handshaking, or reporting a problem rather than being ready for daily use.

Add a Third or Fourth PC​

Repeat the connection process for additional Windows PCs, up to four total devices. Keep the device names clear and distinct. A practical naming pattern such as DESK-W11, LAB-W10, and LAPTOP-DEV is much easier to manage than a small army of machines all called something like DESKTOP-7H3K9.

Quick takeaway: The security key and correct host name are the core pairing ingredients. All devices should remain on the same trusted local network.

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Arrange the PCs to Match Your Real Desk​

After pairing, use the Device layout section in Mouse Without Borders settings to drag each computer into the position that mirrors its physical location.

For example:

• Put a laptop to the left of your main desktop if it physically sits there.
• Place a test PC above the main system if its monitor is mounted overhead.
• Use a 2×2 layout if you work with four machines arranged in a square.

This matters more than it sounds. If PowerToys thinks the laptop is on the right when it is physically on the left, your mouse will appear to vanish in the wrong direction. Technically accurate, ergonomically maddening.

Move the pointer beyond the edge of one screen to enter the adjacent PC. The keyboard follows the active pointer, allowing you to type on whichever machine the mouse currently occupies.

Settings That Make Multi-PC Control Less Accidental​

A few options are especially useful in real-world setups:

• Block mouse at screen corners: Helps prevent accidental switching while using window controls or corner UI elements.
• Wrap mouse: Lets the pointer move from the last device directly back to the first.
• Devices in a single row: Useful for a traditional left-to-right monitor lineup.
• Move mouse relatively: Can help when machines use different resolutions, scaling levels, or more complicated monitor arrangements.
• Hide mouse at the screen’s edge: Can help in cases where keyboard focus does not follow the pointer correctly.
• Disable Easy Mouse when an application is in fullscreen: Helpful when gaming, presenting, or working in a full-screen app where an unintended PC hop would be especially unwelcome.

Mouse Without Borders also supports shortcuts for switching directly to a particular machine, attempting reconnection, toggling Easy Mouse, locking all connected devices, and entering a mode that sends input to multiple PCs. Configure shortcuts carefully; a memorable key combination is useful, while a collision with an existing app shortcut is a small productivity ambush.

Share Clipboard Text and Images​

Enable Share clipboard to copy text, images, and other supported clipboard content on one PC and paste it on another.

A simple test is enough:

1. Copy a short line of text on PC 1 with Ctrl+C.
2. Move the pointer to PC 2.
3. Open Notepad or another text field.
4. Press Ctrl+V.

If the text appears, clipboard sharing is functioning.

This is particularly useful for developers, support technicians, and people working across separate personal and work-adjacent lab systems. Copy a command, a URL, a log fragment, or a screenshot once; paste it where it is needed. No email-to-yourself loop, no chat window acting as a glorified clipboard, no USB stick making a surprise return from 2007.

Remember that clipboard sharing is a convenience feature, not a data-classification system. Turn it off when working with passwords, sensitive client information, regulated data, or anything that should not move automatically between machines.

Transfer Individual Files Between PCs​

Mouse Without Borders can transfer files through the shared clipboard, but the limits are important.

To enable it:

1. In Mouse Without Borders settings, turn on Share clipboard.
2. Enable Transfer file.
3. In File Explorer, select one file and copy it with Ctrl+C.
4. Move to the destination PC and paste with Ctrl+V.

Microsoft documents a 100 MB maximum for this transfer method. It supports one file at a time. Folder transfers and multiple-file selections are not supported through clipboard copy-and-paste; compressing a small collection into a ZIP file is the practical workaround, provided the resulting archive remains under the 100 MB limit.

You can also drag a single local file from one machine across the screen boundary and release it on another connected machine. However, drag-and-drop has the same practical limitations: one file at a time, no folders, and no network files.

For larger transfers, folders, media collections, or regular project synchronization, use a proper network share, OneDrive, SharePoint, or another approved file-sharing solution. Mouse Without Borders is brilliant for the occasional document or installer—not a replacement for grown-up storage workflows.

Quick takeaway: Clipboard-based file transfers require clipboard sharing, support a single file, and stop at 100 MB.

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Elevated Apps and the Lock Screen: Use Service Carefully​

By default, Mouse Without Borders may not control applications running with elevated administrator rights on another PC. Microsoft includes a Use Service option to improve control over elevated apps and the lock screen.

To enable it:

1. Run PowerToys as an administrator.
2. Open Mouse Without Borders settings.
3. Turn on Use Service.

This installs Mouse Without Borders as a service running under the Windows System account. That capability is useful in an IT lab or admin workstation, but it deserves sober judgment: higher privilege also means a larger security consequence if the tool or the connected environment is compromised.

Use service mode only when you genuinely need elevated-app or lock-screen control, and keep it restricted to devices you own or administer on a trusted network. Convenience is excellent; convenience with SYSTEM-level privileges needs a seatbelt.

Troubleshooting Connection Problems​

If the PCs refuse to pair or a connection drops, work through this short checklist.

The initial connection will not complete​

• Confirm both devices are on the same local network.
• Recheck the first PC’s host name and the security key for typing mistakes.
• Use Refresh connections in Mouse Without Borders settings.
• Ensure PowerToys is running on both computers.
• Check whether Windows Firewall is blocking the connection.
• In Mouse Without Borders settings, use Add a firewall rule for Mouse Without Borders if the option is available.
• Verify that restrictive settings such as Same subnet only match your network layout.

Clipboard sharing or file transfers do not work​

• Confirm Share clipboard is enabled.
• Confirm Transfer file is enabled for file copying.
• Test with plain text first, then try a single small local file.
• Keep the file below 100 MB.
• Do not attempt folders, multiple files, or files originating from a network location.
• If transferring a collection, create one ZIP archive and try again.

Keyboard input does not follow the mouse​

This can occur when the originating PC has a full-screen Remote Desktop window, virtual machine session, emulator, or similar application focused. Microsoft’s documented workaround is to enable Hide mouse at the screen’s edge or move focus to another local window before switching.

If the pointer is invisible on a headless or peripheral-free PC, connect a spare mouse temporarily or enable Windows Mouse Keys. It is not glamorous, but neither is explaining to a cursor that it is technically present even when nobody can see it.

A Better Way to Work Across Separate Windows PCs​

Mouse Without Borders is at its best when each computer needs to stay independent: a Windows 11 main workstation beside a Windows 10 compatibility machine, a desktop next to a laptop, or a small test lab for software and browser checks.

It is not a monitor extender, a remote-access service, or a substitute for disciplined file management. What it is, however, is an exceptionally handy bridge between nearby Windows systems: one keyboard, one mouse, shared clipboard, and a modest single-file transfer option when you need it.

Set up the layout carefully, keep pairing inside a trusted local network, enable only the features you need, and this PowerToys utility turns a multi-PC desk from a cable-management cautionary tale into a much calmer place to work.