Remote access lets you control another computer from yours, but the method depends on what you need to do and who owns the machine

Remote access means seeing and controlling another computer's screen and keyboard from your own device, as if you were sitting at that machine. The software you use depends on three things: whether you own both computers, whether the other computer will be left on and connected to the internet, and whether you need access only occasionally or regularly.

The most common setups are remote desktop software (which shows you the full desktop of the other machine), cloud-based tools (which work through a web browser), and built-in operating system features (which come free with Windows or Mac but have limits). Each has different setup steps, security requirements, and costs.

Key Takeaways

  • Windows and Mac both include free remote access tools built in — Remote Desktop on Windows Pro/Enterprise and Screen Sharing on Mac — but they only work on the same local network unless you set up extra steps.
  • Third-party software like TeamViewer, AnyDesk, and Chrome Remote Desktop work across the internet without network setup, but some require paid subscriptions for regular use.
  • The computer you want to access must be powered on, connected to the internet, and have remote access enabled before you can connect to it.
  • Security matters: use strong passwords, enable two-factor authentication if available, and only grant access to people you trust, because remote access gives someone full control of your machine.

Using Windows Remote Desktop for computers on the same network

If both computers are Windows Pro, Enterprise, or Server editions and connected to the same local network (your home or office WiFi), you can use Remote Desktop Connection, which comes built into Windows. This is free and does not require any software installation beyond what Windows already has.

On the computer you want to access, open Settings, go to System, then Remote Desktop, and turn on "Enable Remote Desktop". Write down the computer name (you can find it in System settings under "About"). On your own computer, open Remote Desktop Connection (search for "mstsc" in the Start menu), type in the computer name or IP address of the other machine, and click Connect. You will be asked for the username and password of an account on that remote computer.

This method only works if both machines are on the same network. If you need to access a computer from outside your home or office network, you will need either a third-party tool or to set up port forwarding on your router, which is more complex and carries security risks if not done carefully.

Using Mac Screen Sharing for computers on the same network

Mac computers can share their screen with other Macs on the same network using the built-in Screen Sharing feature. On the Mac you want to access, open System Settings, go to General, then Sharing, and turn on "Screen Sharing". Note the computer's name or local IP address.

On your own Mac, open Finder, click Go in the menu bar, select "Connect to Server", type vnc:// followed by the IP address or computer name of the remote Mac, and click Connect. You will need to enter the password of a user account on that remote machine. Once connected, you will see its desktop and can control it as if you were sitting there.

Like Windows Remote Desktop, this works only on the same local network. For internet access, you would need to use a third-party tool or set up a VPN connection between the two Macs.

Using Chrome Remote Desktop for internet access

Chrome Remote Desktop is a free tool from Google that works through your web browser and does not require both computers to be on the same network. It works on Windows, Mac, and Linux, and you only need a Google account.

On the computer you want to access, go to remotedesktop.google.com, sign in with your Google account, click "Set up remote access", and follow the prompts to read and install the Chrome Remote Desktop app. You will be asked to create a PIN (a 6-digit number) that you will use to connect from other devices. The app will run in the background.

From any other computer, go to remotedesktop.google.com, sign in with the same Google account, find the remote computer in the list, click it, and enter the PIN. Your browser will open a window showing the remote desktop. This method is free for personal use and does not require network setup, but the computer you want to access must be powered on and have the Chrome Remote Desktop app running.

Using TeamViewer or AnyDesk for regular or professional access

TeamViewer and AnyDesk are third-party remote access programs that work across the internet on Windows, Mac, and Linux. Both are free for personal, non-commercial use, but charge for regular business use. They are popular because they work when ready without network configuration and handle firewalls automatically.

To set up TeamViewer, read it from teamviewer.com, install it on the computer you want to access, and note the ID number that appears in the main window. On your own computer, read TeamViewer, open it, enter that ID number under "Control Remote Computer", and click Connect. You will be prompted for a password (either the one you set during installation or a temporary one generated by the app).

AnyDesk works similarly: read it from anydesk.com, install it on the remote computer, note the address shown in the app, then read AnyDesk on your own computer, enter that address, and click Connect. Both programs offer free plans for personal use but limit session length or features; paid plans remove these restrictions.

Security steps you should take before enabling remote access

Remote access gives someone complete control of your computer, so security is critical. Use a strong password — at least 12 characters mixing uppercase, lowercase, numbers, and symbols — rather than something straightforward. If the remote access tool offers two-factor authentication (a second verification step, usually a code sent to your phone), turn it on.

Only enable remote access on computers you actually need to access remotely, and disable it on machines you do not. If you use a third-party tool, check its privacy policy to understand what data it collects. For built-in tools like Remote Desktop or Screen Sharing, make sure you trust everyone who has a user account on that computer, because they can use remote access to connect to it.

If you are setting up remote access for someone else to help you (for tech support, for example), use a temporary password or PIN that you change afterward, and disconnect the session when the work is done. Never leave remote access enabled on a computer that is exposed to the public internet without a firewall or VPN protecting it.

Troubleshooting common remote access problems

If you cannot connect, the most common reason is that the remote computer is powered off or not connected to the internet. Check that the computer is on and that its internet connection is working. For network-based tools like Windows Remote Desktop or Mac Screen Sharing, make sure both computers are on the same WiFi network.

If the connection times out or drops frequently, the remote computer may have a weak internet connection, or a firewall may be blocking the connection. Restart both computers and try again. If you are using a third-party tool and it still does not work, check the tool's support documentation — some require you to allow the app through your firewall or to disable certain security software temporarily.

If you can connect but the screen is very slow or laggy, reduce the image quality in the remote access tool's settings, or close other programs on the remote computer to free up bandwidth and processing power. For tools like TeamViewer and AnyDesk, you can usually adjust the resolution and refresh rate to improve speed.

Frequently Asked Questions

Can I use remote access if the other computer is turned off?

No. The remote computer must be powered on and connected to the internet for you to access it. Some computers support "Wake-on-LAN", a feature that lets you turn on a computer remotely, but this requires special setup and only works on the same local network.

Is remote access safe to use on public WiFi?

It is safer than many activities on public WiFi, but not completely risk-free. Tools like Chrome Remote Desktop, TeamViewer, and AnyDesk encrypt the connection, so someone on the same WiFi network cannot easily see what you are doing. For extra safety, use a VPN on top of the remote access tool.

What is the difference between remote access and remote support?

Remote access means you control another computer. Remote support usually means someone else controls your computer to help you fix a problem. The setup is similar, but the direction of control is reversed. Both require the same security precautions.

Can I access a work computer from home using these tools?

It depends on your company's policy. Many organizations provide their own remote access software or VPN for security reasons and do not allow personal tools like TeamViewer. Check with your IT department before setting up remote access to a work machine.

Do I need to pay for remote access software?

Not for personal use. Windows Remote Desktop, Mac Screen Sharing, and Chrome Remote Desktop are all free. TeamViewer and AnyDesk are free for personal, non-commercial use, though they may limit session length or features. Paid plans start around $50 to $100 per year if you need business-level features.