Remote access means seeing and controlling another computer's screen from your own device

When you remote into another computer, you're viewing its desktop and controlling its mouse and keyboard from wherever you are. The other computer stays on and connected to the internet, and you see everything happening on its screen in real time on your device. This is different from file sharing or cloud storage — you're not just moving files, you're actually operating the machine itself.

The method you choose depends on what you're trying to do: support a family member's computer, access your work machine from home, or let someone else troubleshoot your system. Each approach has different setup steps and security considerations.

Key Takeaways

  • Windows includes a built-in remote tool called Remote Desktop Connection that works between Windows computers on the same network or over the internet.
  • Mac users can use the built-in Screen Sharing feature to connect to other Macs, or use third-party tools like TeamViewer or Chrome Remote Desktop for cross-platform access.
  • Chrome Remote Desktop and TeamViewer work on Windows, Mac, and Linux, and don't require both computers to be on the same network.
  • The computer you're connecting to must be powered on, have remote access enabled in its settings, and have a stable internet connection.
  • You'll need either the other person's username and password, a PIN they set up, or an invitation link they send you — depending on which tool you use.

Windows Remote Desktop Connection for Windows-to-Windows access

Remote Desktop Connection is built into Windows Pro, Enterprise, and Education editions (not Home). It lets you connect to another Windows computer if both are on the same network or if the host computer is set up for internet access.

On the computer you want to control, open Settings, go to System, then select Remote Desktop from the left menu. Toggle "Enable Remote Desktop" on. Write down the computer name shown on that screen — you'll need it to connect. You can find the computer name by right-clicking "This PC" or "My Computer" and selecting Properties.

On your own computer, open Remote Desktop Connection (search for "Remote Desktop" in the Start menu). Type the computer name or IP address of the machine you want to access, then click Connect. You'll be asked for the username and password of an account on that computer. After you enter them, you should see the other computer's desktop on your screen.

Remote Desktop Connection works best on the same local network. If you want to access a computer from outside your home or office network, you'll need to set up port forwarding on your router or use a VPN — both are technical steps that benefit from professional help if you're not comfortable with networking.

Mac Screen Sharing for Mac-to-Mac connections

If both computers are Macs, Screen Sharing is built in and simpler than Windows Remote Desktop. On the Mac you want to control, open System Settings, go to General, then select Sharing. Click the checkbox next to Screen Sharing to turn it on.

On your own Mac, open Finder, click Go in the menu bar, then select "Connect to Server." Type the IP address or computer name of the other Mac (you can find this in its Sharing settings). Click Connect, and you'll be asked for a username and password from that computer. Once you enter them, the other Mac's screen appears in a window on your display.

Like Remote Desktop, Screen Sharing works best on the same local network. For remote access from outside your network, you'll need additional setup or a third-party tool.

Chrome Remote Desktop for any operating system

Chrome Remote Desktop is free and works on Windows, Mac, and Linux. It doesn't require both computers to be on the same network, and setup is straightforward.

First, install the Chrome Remote Desktop extension from the Chrome Web Store on both computers. On the computer you want to control, open the extension and click "Turn on" under Remote information. You'll see a PIN appear — share this PIN with the person who will be controlling your computer, or use the "Share" button to send them an invitation link.

On the computer you're using to connect, open the Chrome Remote Desktop extension, click the computer you want to access from the list, and enter the PIN. Your screen will show the other computer's desktop. You can control it just as if you were sitting at that machine.

Chrome Remote Desktop requires both computers to have Chrome installed and the extension active. The connection goes through Google's servers, so both computers need an internet connection. If you're concerned about privacy, note that Google can see the connection is happening, though they cannot see what's on the screen.

TeamViewer for support and remote work

TeamViewer is a paid tool (with a free tier for personal use) that works across Windows, Mac, and Linux. It's popular for technical support because the person being helped doesn't need to know their computer's IP address or set up anything in advance.

read TeamViewer on both computers. On the computer being controlled, the app shows a 9-digit ID and a password. The person connecting enters that ID and password into their own TeamViewer window, and the connection starts. No network setup or port forwarding needed.

TeamViewer's free version is unlimited for personal use but requires you to accept that it's being used non-commercially. If you're using it for business or want to avoid the occasional prompt, you'll need a paid license. The connection is encrypted and goes through TeamViewer's servers, similar to Chrome Remote Desktop.

What you need before you start

The computer you're connecting to must be powered on and awake (not in sleep mode). If it's asleep, you won't be able to reach it. It also needs to be connected to the internet — either through WiFi or ethernet.

You'll need either the password for an account on that computer, or a PIN or invitation link that the owner has set up. If you're helping someone else, ask them to send you the PIN or link before you try to connect. If it's your own computer, you already know the password.

Both computers need a stable internet connection. Remote access over a slow or unreliable connection will be sluggish and frustrating. If either computer keeps dropping internet, fix that first before troubleshooting the remote access itself.

Security and when to call for help

Never share your PIN, password, or invitation link with someone you don't trust. Remote access gives the other person full control of your computer, including access to files, email, and any accounts you're logged into. Only enable remote access when you need it, and turn it off when you're done.

If you're setting up remote access for the first time and get stuck on network settings, port forwarding, or firewall rules, contact your internet provider's technical support or a local computer repair shop. These steps vary by router model and network setup, and a professional can walk you through them faster than troubleshooting alone.

If the connection keeps dropping, the screen is very slow, or you can't connect at all, restart both computers and check that both have working internet. If that doesn't fix it, try a different remote access tool — sometimes one works better than another depending on your network setup.

Frequently Asked Questions

Can I remote into a computer that's turned off?

No. The computer you're connecting to must be powered on and awake. If it's in sleep mode, you won't be able to reach it. Some computers support "Wake on LAN," which lets you turn them on remotely, but that requires special setup on your network.

Do both computers need to be on the same WiFi network?

Not with Chrome Remote Desktop or TeamViewer — those work over the internet. Windows Remote Desktop and Mac Screen Sharing work best on the same local network, though you can set them up for internet access with additional configuration.

What if I forget the PIN or password?

If you set up a PIN in Chrome Remote Desktop or TeamViewer, you can generate a new one by opening the app on that computer. If you forgot the Windows or Mac account password, you'll need to reset it on that computer directly — remote access won't help you get back in.

Is remote access safe?

Remote access is as safe as the password or PIN you use. Use a strong, unique PIN if the tool generates one, and never share it with people you don't trust. All three tools mentioned here encrypt the connection, so someone on your WiFi can't see what's happening on the remote screen.

Can I use remote access on my phone or tablet?

Chrome Remote Desktop and TeamViewer both have mobile apps for iOS and Android, so you can control a computer from a phone or tablet. Windows Remote Desktop and Mac Screen Sharing do not have official mobile versions.