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

Your computer's name is the identifier that appears on your network and in system settings — it's what other devices see when they look for shared files or printers on your home or office network. By default, Windows assigns a name like "DESKTOP-ABC1234" and Mac uses something like "MacBook-Pro-2". You can change this to anything you want: your name, a project name, or a descriptive label that helps you identify the machine in a list.

Changing the name does not affect your files, passwords, or how the computer runs. It's purely a label. You might change it to make your device easier to find on a shared network, to match a naming system at work, or straightforward because you want something more personal than the factory default.

Key Takeaways

  • On Windows, you change the computer name through Settings > System > About, then click "Rename this PC" and restart.
  • On Mac, go to System Settings > General > About and click "Edit" next to the computer name field.
  • Computer names can include letters, numbers, and hyphens, but not spaces or special characters like @ or #.
  • The change takes effect when ready on Mac; Windows requires a restart before the new name appears on your network.
  • If you're on a work network managed by your IT department, you may not have permission to change the name yourself.

Changing your computer name on Windows 10 and 11

Open the Settings app by pressing the Windows key and typing "Settings," then press Enter. Once Settings opens, click System in the left sidebar, then scroll down and click About. You'll see a section labeled "Device name" with your current computer name displayed.

Click the button labeled Rename this PC. A text box will appear with your current name highlighted. Delete the old name and type your new one. Computer names can be up to 63 characters long and can include letters, numbers, and hyphens, but cannot include spaces or special characters like @, #, $, or &. Once you've typed the new name, click Next.

Windows will ask you to restart your computer to explore the change. Click Restart now or Restart later depending on whether you want to restart when ready. The new name will appear on your network and in system settings after the restart completes. If you restart later, the change won't take effect until you do restart.

Changing your computer name on Mac

Click the Apple menu in the top-left corner of your screen and select System Settings (on newer Macs) or System Preferences (on older ones). In System Settings, click General in the sidebar, then click the About tab. You'll see a field labeled "Computer Name" near the top.

Click the Edit button next to the computer name. A text box will appear. Delete the current name and type your new one. Like Windows, Mac computer names can include letters, numbers, and hyphens, but not spaces or most special characters. Once you've entered the new name, click Done. The change takes effect when ready — you do not need to restart.

You may also see a field labeled "Local Hostname" below the computer name. This is a separate identifier used for network connections and typically ends in ".local". You can edit this too if needed, but for most home users, changing only the computer name is sufficient.

What to do if you cannot change the computer name

If the rename button is grayed out or you see a message saying you don't have permission, your computer may be managed by an organization. Many workplaces, schools, and institutions lock down this setting so only IT administrators can change device names. In that case, contact your IT department or help desk — they can change it for you or explain whether a change is allowed.

On Windows, you might also see an error message if the name you chose is already in use on your network, contains invalid characters, or is a reserved system name. Try a different name with only letters and numbers, no spaces or hyphens, and make sure no other device on your network has that exact name.

Common mistakes to avoid when renaming

The most frequent error is using spaces in the computer name. "My Computer" will not work; "My-Computer" or "MyComputer" will. Similarly, avoid special characters like periods, commas, asterisks, or question marks — they cause problems on networks. Stick to letters, numbers, and hyphens only.

Another mistake is restarting Windows before the rename dialog has fully closed. If you see the restart prompt, let it complete on its own rather than forcing a restart manually. On Mac, since the change is when ready, this is not an issue.

Finally, don't assume the change is complete if you don't see it reflected when ready in File Explorer or Finder. On Windows especially, it can take a few minutes for the new name to appear in network listings and shared folder paths, even after restart. If it still hasn't appeared after 10 minutes, restart again or check that you actually clicked the restart button.

How the computer name appears on your network

Once you've changed the name, it will show up in a few places. In File Explorer on Windows or Finder on Mac, you'll see it in the sidebar under "This PC" or "Locations." On your network, when you look for shared printers or file shares, the computer name is what identifies your device to other machines. If you're sharing files with others, they'll see your computer name in their network browser.

If you're using cloud services like OneDrive, Google Drive, or iCloud, the computer name also appears in your account settings under "Devices" or "Connected devices." This helps you identify which physical machine is syncing files. If you have multiple computers, a clear naming system makes it much easier to manage them all.

Frequently Asked Questions

Will changing my computer name affect my files or passwords?

No. The computer name is purely a label for identification on your network. Your files, user account, passwords, and all software remain exactly the same. The change is cosmetic and does not touch any data or security settings.

Can I use spaces or special characters in the computer name?

No. Both Windows and Mac restrict computer names to letters, numbers, and hyphens. Spaces and special characters like @, #, $, or & will cause errors. If you want to separate words, use hyphens: "Home-Office-PC" instead of "Home Office PC".

Do I need to restart my computer after changing the name on Mac?

No. Mac applies the change when ready. Windows, however, requires a restart before the new name appears on your network and in system settings.

What if another device on my network already has the name I want?

Windows and Mac will usually warn you if the name is already in use. Choose a different name, perhaps by adding a number or location: "Office-PC-1" or "Bedroom-Mac". Make sure the new name is unique on your network before confirming the change.

Can I change my computer name if I'm on a work network?

It depends on your organization's policies. Many workplaces, schools, and institutions lock this setting so only IT administrators can change device names. If the rename option is unavailable, contact your IT department — they can change it for you or let you know if it's not permitted.