How to use a laptop as a second monitor in Windows 10/11. –

In Windows 10 and Windows 11, Microsoft added a Miracast feature that lets you use your laptop screen as a second monitor on another computer. Miracast technology allows you to transmit or receive content wirelessly between devices that support it.

Multitasking on a single computer screen can be inefficient and ineffective. Imagine that as a data analyst, you need to collect data using an Excel spreadsheet, query the data with SQL to find correlations, and use Tableau to visualize your findings. Doing all these tasks on a single screen causes lag and fatigue.

Installing a laptop as a second monitor of another computer is a convenient and useful solution that gives you many advantages. For example, it gives you more work space and allows you to run several programs at the same time by moving the mouse from one screen to another.

If you want to know how to use a laptop as a second monitor on your main computer, continue reading below. (Instructions are also applicable for Windows 10/11 OS)

How to use a laptop screen as a second monitor on another computer.

* Important: To use a laptop screen as a secondary display on another computer, both computers must be wirelessly connected to the same network, running Windows 10 or 11, and supporting Miracast. **

** Note: To find out if your devices support Miracast:

1. Press Windows + K buttons to open Connect options.

2. If you see the option “Connect to a wireless display” at the bottom, it means that your device supports Miracast.

Step 1. Set up your laptop as a second monitor.

To use your laptop’s monitor as a second monitor on another computer, you need to enable Project to this PC on your laptop. For this:

1. From whom Start menu image_thumb[2]_thumb press Settings image and select System.

2. In the right panel, scroll down and click Project to this computer.

How to use a laptop as a second monitor in Windows 10/11

3. In the “Project to this computer” options:

a. Choose It is ubiquitous on secure networks under Some Windows and Android devices can project to this computer if you say OK. This ensures that only protected networks in your home can project to your laptop.

b. Yes Ask to project to this computer options: select Every time a connection is requestedor select Only the first time if you don’t want to receive a notification every time you use your laptop as a monitor.

c. A PIN code is required to connect: Set a PIN code to prevent other devices from displaying on the laptop screen. (This is recommended if you are connected to a public network, otherwise leave it to “Never”).

d. This computer can only be found for projection when it is plugged in: Tune in to it ON if you want to save battery power.*

*Note: After configuring all of the above, pay attention to the computer name (computer name) below, because it will be needed when you choose which device to connect to on another computer.

Project to this computer

4. Once you are done with the above settings, type Connect in the search bar and click It’s open. This prepares the laptop for connecting to it from another computer.

Use a laptop as a monitor

Step 2. Connect to the laptop monitor from another computer.

On the other computer you want to project to the laptop monitor:

1. click on Windows + P keys to open Project widget and select Duplicate or Extend.

  • Duplicate: The computer and the external monitor display the same thing.
  • Expansion: This option allows you to extend the desktop to the connected monitor. Expanding the screen allows you to have more screen real estate and different open windows on each screen.


2. Finally, select a laptop with a “shared monitor” from the available devices and connect to it. *

* Notes
An additional way to connect to the monitor of the laptop is to press the button Windows + K and then select the laptop to connect to.

2. If you selected the “Extend” option, after connecting to a laptop monitor, you can “rearrange” the monitors to suit your needs from the display settings, or set the laptop monitor as the primary display. For this:

a. go to Start menu > Settings and select Display on the left.
b. Find and click Determination button. It shows a number on each display to help you identify them.
c. If desired, drag and drop the displays to reorder them (and select apply), or check the “Make this my primary display” box at the bottom of this page to designate your laptop’s monitor as your primary monitor.


That’s it! Let me know if this guide helped you by leaving a comment about your experience. Please like and share this guide to help others.

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