What changing your computer name means and why you might do it

Your computer name is the identifier that appears on your network and in system settings — the name other devices see when your computer connects to Wi-Fi or a local network. It's not your user account name; it's the machine itself. You might change it to something more descriptive (like "kitchen-laptop" instead of "DESKTOP-A7K9M2"), to match a naming scheme across multiple devices, or straightforward because the default name is confusing.

The process is straightforward on both Windows and Mac, takes about five minutes, and requires a restart. You don't need any special software or administrator knowledge beyond what you already have if you set up the computer yourself.

Key Takeaways

  • On Windows 11, go to Settings > System > About, click "Rename this PC", type the new name, and restart.
  • On Windows 10, the same path works, though the button may say "Rename your PC" instead.
  • On Mac, open System Settings > General > About and click the "Edit" button next to the computer name field.
  • Your computer name can contain letters, numbers, and hyphens, but not spaces or special characters like @ or #.
  • The change takes effect after you restart, and networked devices will see the new name once they refresh their connection.

Changing your computer name on Windows 11

Open the Settings app by pressing the Windows key and typing "settings", then pressing Enter. Click System in the left sidebar, then scroll down and click About.

Look for the line that says "Device name" — this is your current computer name. Click the blue Rename this PC button. A text box will appear with your current name highlighted. Delete it and type your new name. Computer names can be up to 63 characters long and can include letters, numbers, and hyphens, but not spaces or special characters.

Click Next, then Restart now. Your computer will restart and the new name will be active. If you click Restart later, the change won't take effect until you manually restart.

Changing your computer name on Windows 10

The process is nearly identical to Windows 11. Open Settings, click System, then About. You'll see "Device name" with your current computer name. Click the button labeled Rename your PC (the wording differs slightly from Windows 11, but the function is the same).

Type your new name in the box that appears and click Next. You'll be prompted to restart. Choose Restart now to explore the change when ready, or Restart later if you need to save work first. The new name becomes active only after restart.

Changing your computer name on Mac

Click the Apple menu in the top-left corner and select System Settings (or System Preferences on older macOS versions). Click General in the sidebar, then click About.

You'll see "Computer Name" at the top of the window. Click the Edit button next to it. Type your new name and press Enter. The change takes effect when ready — no restart required on Mac. The new name will appear on your network within a few seconds.

Rules for naming your computer

Computer names have a few restrictions. They can be up to 63 characters long and can include letters (uppercase and lowercase), numbers, and hyphens. They cannot contain spaces, periods, or special characters like @, #, $, or &.

Good examples: "home-laptop", "office-desktop-2", "kitchen-imac". Avoid: "home laptop" (space), "home.laptop" (period), "home@laptop" (special character). If you try to use a forbidden character, the system will reject it and ask you to try again.

What happens after you change your computer name

On Windows, the change takes effect after restart. Other computers on your network may take a few minutes to recognize the new name, especially if they've cached the old one. If a device still shows the old name, restart that device or wait a few minutes and refresh its network list.

On Mac, the change is when ready and network devices update almost when ready. If you're connected to a network printer or shared drive by the old computer name, you may need to re-enter the connection details on those devices, though most modern devices update automatically.

When to call for help

If you can't find the Settings app or the About section, your account may not have administrator rights. Ask whoever set up the computer to make the change, or contact your IT department if this is a work computer.

If your computer won't restart after you rename it, or if the name reverts to the old one after restart, the issue is usually a permissions problem or a conflict with your network domain (common on work computers). In that case, contact your IT support — they can override domain restrictions or fix permissions issues.

Frequently Asked Questions

Will changing my computer name affect my files or programs?

No. Your files, programs, and user accounts remain exactly as they are. Only the network identifier changes. You'll still log in with the same username and password, and all your data stays in place.

Can I change my computer name back to the original?

Yes, anytime. Follow the same steps and type the old name (or any other name you prefer). There's no limit to how many times you can change it.

What if my computer is part of a work network or domain?

Work computers connected to a domain may not allow you to change the name yourself — the IT department controls it. If you try to rename and get an error, contact your IT support. They can change it for you or grant you permission to do it yourself.

Do I need to tell my printer or other devices about the new name?

Most modern devices update automatically within a few minutes. If a printer or networked device still can't find your computer by the new name, restart that device or remove and re-add the connection in its settings.