What changing your computer name means and why you might do it
Your computer name is the identifier that appears when you connect to a network, share files, or set up printers and other devices. It is the name other people see when they browse for computers on a shared network. By default, Windows and Mac assign generic names like "DESKTOP-ABC123" or "MacBook-Pro", but you can change it to something meaningful like "Home-Office" or "Kitchen-Laptop".
Changing your computer name does not affect your files, programs, or settings — it is purely a label. You might rename your computer to make it easier to identify on a network, to match a naming system you use across multiple devices, or straightforward because you want something more personal than the factory default.
Key Takeaways
- On Windows, you access the rename function through Settings > System > About, then click "Rename this PC" and restart your computer.
- On Mac, you go to System Settings > General > About and click the "Edit" button next to the computer name field.
- Computer names can include letters, numbers, and hyphens, but not spaces or special characters like @ or #.
- After renaming, your computer may take a few minutes to update the name across all connected networks and devices.
- You need administrator access on your account to change the computer name on either operating system.
How to rename your computer in Windows 10 and 11
Open the Settings app by pressing the Windows key and typing "Settings", then press Enter. Click on "System" in the left sidebar, then scroll down and click "About". You will see a section labeled "Device name" with your current computer name displayed.
Click the button labeled "Rename this PC". A dialog box will appear with a text field containing your current name. Delete the existing text and type your new name. The name can be up to 63 characters long and can include letters, numbers, and hyphens, but not spaces or special characters. Click "Next" when you are done.
Windows will ask you to restart your computer to explore the change. You can restart when ready or choose to restart later. The new name will not take effect until you restart. After you restart, the change is complete, though it may take a few minutes for the new name to appear across all network connections.
How to rename your computer on Mac
Click the Apple menu in the top-left corner and select "System Settings" (or "System Preferences" on older versions of macOS). Click "General" in the sidebar, then look for the "About" section. At the top, you will see "Computer Name" with your current name displayed.
Click the "Edit" button next to the computer name. A text field will become active. Delete the current name and type your new one. Mac names can be up to 63 characters and can include letters, numbers, and hyphens, but not spaces or special characters. Press Return or click "OK" to save the change.
Unlike Windows, Mac does not require a restart. The new name takes effect when ready, though it may take a minute or two to update across your network and any connected devices like printers or shared drives.
Rules for naming your computer
Both Windows and Mac follow the same basic rules for computer names. Your name can include uppercase and lowercase letters, numbers, and hyphens. It cannot include spaces, periods, or special characters like @, #, $, %, or &. If you try to use a forbidden character, the system will reject it and ask you to edit the name.
The name can be up to 63 characters long, though shorter names (under 20 characters) are easier to remember and type. Avoid names that are only numbers, as some network systems have trouble with purely numeric names. A good practice is to use a name that describes the computer's location or purpose — "Home-Office", "Bedroom-Laptop", or "Kitchen-Desktop" — so anyone on your network can tell which device is which.
What happens after you change your computer name
On Windows, the change takes effect after you restart. On Mac, it takes effect when ready. In both cases, the new name may take a few minutes to propagate across your network. If you have printers, network drives, or other devices connected to your computer, they may continue to show the old name for a short time until they refresh their network discovery.
If you share files with other computers on your network, those computers will see the new name the next time they browse the network or reconnect to shared folders. If you have mapped network drives or set up network shortcuts pointing to your computer by its old name, those shortcuts may stop working and you will need to update them with the new name.
Troubleshooting if the rename does not work
If you see an error message saying the name is already in use or is invalid, check that you have not used spaces, special characters, or forbidden words. Some networks reserve certain names for system use — if you get an error, try a different name with numbers or hyphens added.
On Windows, if the rename button is grayed out or missing, you may not have administrator access on your account. Ask the person who manages your computer to change the name for you, or check that you are logged into an administrator account. On Mac, if the Edit button does not appear, try logging out and back in, or restart your computer and try again.
Frequently Asked Questions
Will changing my computer name affect my files or programs?
No. Renaming your computer does not touch any of your files, programs, settings, or passwords. It only changes the label that appears on your network. Everything on your computer works exactly as before.
Can I change my computer name back to the original?
Yes, you can change it as many times as you want using the same steps. Go back to Settings > System > About on Windows or System Settings > General > About on Mac and rename it again.
Do I need to tell my internet provider about the name change?
No. Your internet provider does not care what your computer is called. The name change only affects how your computer appears on your local network and to devices connected to your router.
What if I share my computer with other people?
You need administrator access to change the computer name. If you share the computer with others, only the person with administrator rights can make this change. The new name will be the same for all users on that computer.
How long does it take for the new name to show up everywhere?
On Mac, the change is when ready. On Windows, it takes effect after you restart. Across your network, it may take a few minutes for printers, other computers, and network devices to recognize the new name.