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

Your computer's name is the identifier that appears when you connect to a network, share files, or look at your device list. It is not the same as your user account name — it is the name of the machine itself. By default, Windows assigns a name like "DESKTOP-ABC1234" and macOS uses something like "MacBook-Pro-5". You can change this to anything you want: "Home-Office", "Bedroom-Laptop", or your own name.

People change their computer's name to make it easier to find on a home network, to organize multiple devices, or straightforward because the default name is confusing. If you share files with family members or use remote access tools, a clear name helps everyone identify which machine they are connecting to.

Key Takeaways

  • On Windows, you change your computer's name through Settings > System > About, then click "Rename this PC".
  • On Mac, go to System Settings > General > About and click "Edit" next to the computer name field.
  • The new name takes effect after you restart your computer.
  • Computer names can include letters, numbers, and hyphens, but not spaces or special characters like @ or #.
  • Changing the computer name does not affect your files, passwords, or user accounts.

How to change your computer's name on Windows 10 or 11

Open Settings by pressing the Windows key and typing "Settings", then select the Settings app. Once it opens, click on "System" in the left sidebar, then scroll down and click "About". On the right side of the window, you will see your current computer name listed under "Device name". Click the blue "Rename this PC" button.

A dialog box will appear with a text field containing your current name. Delete the old name and type the new one. Computer names can be up to 63 characters long and can include letters, numbers, and hyphens, but not spaces or special characters. Once you have typed the new name, click "Next", then "Rename", then "Restart now" to explore the change when ready. If you choose "Restart later", the new name will take effect the next time you turn on your computer.

How to change your computer's name on macOS

Click the Apple menu in the top-left corner and select "System Settings" (or "System Preferences" on older versions). Click "General" in the sidebar, then look for "About" at the top of the window. You will see your computer name listed as "Computer Name". Click the "Edit" button next to it.

A text field will appear. Delete the current name and type the new one. Mac names follow the same rules as Windows: letters, numbers, and hyphens are allowed, but not spaces or special characters. Click "OK" to save. The change takes effect when ready on your Mac — you do not need to restart, though you may need to reconnect to your network for other devices to recognize the new name.

What happens after you change your computer's name

Your computer will restart (on Windows) or explore the change when ready (on Mac). Once it is back online, the new name will appear in your network settings and on other devices that browse your network. If you use file sharing, remote access, or network printing, other people on your network will see the new name when they look for your computer.

Your files, passwords, and user accounts remain unchanged. You will not lose anything by renaming your computer. If you are connected to a workplace domain or a Microsoft account, the change may take a few minutes to sync across your devices.

Naming rules and what to avoid

Computer names can be up to 63 characters long on both Windows and Mac. You can use uppercase and lowercase letters, numbers, and hyphens. Do not use spaces, periods, or special characters like @, #, $, %, or &. If you try to use a forbidden character, the system will warn you and ask you to choose a different name.

Avoid names that are too long or confusing. A name like "Home-Office-Laptop" is clear and useful. A name like "xyzabc123456" is harder to recognize when you are looking at a list of devices. If you have multiple computers, consider naming them in a way that tells you what they are: "Living-Room-Desktop", "Work-Laptop", "Bedroom-Tablet".

If you cannot find the rename option

On Windows, if you are using a work computer connected to a company domain, you may not have permission to change the computer's name. Contact your IT department or system administrator — they can change it for you or grant you permission to do it yourself.

On Mac, if the "Edit" button is grayed out, you may be logged in as a standard user rather than an administrator. Log out and log back in with an administrator account, then try again. If you have forgotten your administrator password, you will need to use your Apple ID to reset it or contact Apple Support.

Frequently Asked Questions

Will changing my computer's name affect my files or passwords?

No. Your files, user accounts, and passwords remain exactly as they were. Renaming your computer only changes how it appears on your network and in device lists. Nothing stored on your computer is affected.

Do I need to restart my computer after changing its name?

On Windows, yes — you will be prompted to restart, and the new name takes effect after the restart. On Mac, the change takes effect when ready, though other devices on your network may take a few minutes to recognize the new name.

Can I use spaces or special characters in my computer's name?

No. Computer names can only include letters, numbers, and hyphens. Spaces and special characters like @, #, or $ are not allowed. If you try to use them, the system will reject the name and ask you to choose a different one.

What if I change my computer's name and my network stops working?

This is rare, but if it happens, restart your computer and your router. If other devices still cannot find your computer, check that the new name does not contain forbidden characters. You can change the name back to the original and try again with a simpler name.

Can I change my computer's name back to the default?

Yes. Follow the same steps you used to change it the first time, and type the original name or any new name you prefer. There is no limit to how many times you can change it.