What changing your computer name means and why you might do it
Your computer name is the label that identifies your machine on a network and appears in system settings, file sharing, and when you connect to printers or other devices. It is not the same as your user account name — you can have one computer name and multiple user accounts on it. Changing it is straightforward and takes about five minutes, though your computer will need to restart for the change to take effect.
Most people change their computer name to make it easier to find on a home network, to match a naming system at work, or straightforward because the default name (often something like "DESKTOP-ABC123") is not meaningful. If you share files with others or use remote access tools, a clear computer name makes troubleshooting easier too.
Key Takeaways
- Your computer name is separate from your user account name and appears when you connect to networks or shared devices.
- On Windows, you change it through Settings > System > About, then click "Rename this PC" and restart.
- On Mac, you change it through System Settings > General > About, then click "Edit" next to the computer name field.
- Computer names can contain letters, numbers, and hyphens, but not spaces or special characters like @ or #.
- The change takes effect when ready on Mac but requires a restart on Windows.
How to rename your computer on Windows 11
Open the Settings app by pressing the Windows key and typing "Settings," then pressing Enter. Once Settings opens, select System from the left sidebar, then scroll down and click About.
On the About page, you will see your current computer name listed under "Device name." Click the blue Rename this PC button. A text box will appear with your current name highlighted. Delete it, type your new name, and click Next. Windows will ask you to restart your computer — click Restart now to explore the change when ready, or Restart later if you need to save work first. Your computer will restart and the new name will be active.
If you are using Windows 10, the process is nearly identical: go to Settings > System > About, then look for a button labeled Rename your PC instead of "Rename this PC." The rest of the steps are the same.
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 macOS versions). In the sidebar, click General, then click the About tab.
You will see a field labeled "Computer Name" near the top of the window. Click the Edit button next to it, type your new name in the text box that appears, and press Enter or click Done. The change takes effect when ready — no restart is needed. You may also see a field called "Local Hostname" below the computer name; you can leave this as is or edit it to match, though it is not required.
Rules for naming your computer
Computer names can include uppercase and lowercase letters (A–Z, a–z), numbers (0–9), and hyphens (-). They cannot contain spaces, periods, or special characters like @, #, $, or &. Most systems limit the name to 15 characters on Windows and 63 characters on Mac, though shorter names are easier to type and remember.
A good computer name is descriptive but brief — examples include "home-laptop," "office-desktop," or "bedroom-mac." Avoid names that are too similar to other computers on your network, as this can cause confusion when browsing shared files or printers. If you are naming computers in a workplace, check with your IT department first to see if there is a naming convention you should follow.
What happens after you change your computer name
On Windows, the change is not active until you restart, so plan for a brief downtime. On Mac, the change is when ready. Either way, the new name will appear the next time you connect to a network, share files, or print to a networked printer. If you are currently connected to a network drive or printer, you may need to reconnect it after the rename, as some devices cache the old computer name.
If you use remote access software like TeamViewer or Microsoft Remote Desktop, the computer name change will be reflected the next time you launch the process. If you have set up file sharing with other computers, they will see the new name in their network browser. There is no need to notify other users manually — the change propagates automatically once the computer is back online.
Troubleshooting if the rename does not work
If you see an error message when trying to rename, the most common cause is that you are not logged in with administrator rights. On Windows, right-click Settings and select "Run as administrator," then try again. On Mac, you may be prompted to enter your password when you click Edit — do so and the rename should proceed.
If the name reverts to the old one after restart, a few things could be happening. On Windows, some corporate networks or domain-joined computers have policies that override manual name changes — if you are on a work network, contact your IT department. On Mac, check that you are logged in with an administrator account. If neither applies and the problem persists, restart your computer again; sometimes the change takes two restarts to fully explore.
When you might need to change your computer name again
If you set up a new computer and want to match the naming scheme of your other devices, rename it right away before you set up file sharing or network printers. If you are troubleshooting a network problem and a technician asks for your computer name, you can change it to something more descriptive to make their job easier. If you sell or give away your computer, you may want to rename it back to a generic name before handing it over, though this is optional.
You can change your computer name as many times as you want — there is no limit. Each time you do, just remember that Windows requires a restart and Mac does not. If you are managing multiple computers, consider keeping a list of names and what they refer to, especially if you use remote access or file sharing.
Frequently Asked Questions
Can I use spaces or special characters in my computer name?
No. Computer names can only contain letters, numbers, and hyphens. Spaces, periods, and special characters like @, #, or $ will cause an error. If you want to separate words, use a hyphen instead — for example, "home-office-mac" instead of "home office mac."
Do I need to change my user account name too?
No. Your computer name and user account name are separate. You can have a computer named "living-room-laptop" with a user account named "Sarah." Changing one does not affect the other. If you want to change your user account name, that is a different process done in the same Settings area.
Will changing my computer name affect my files or programs?
No. Your files, programs, and settings will remain exactly as they are. The only thing that changes is the label your computer uses on a network. You may need to reconnect to network printers or shared drives, but your local files and installed software are unaffected.
What if I forgot my computer name and want to check it?
On Windows, open Settings > System > About and look at the "Device name" field. On Mac, open System Settings > General > About and look at the "Computer Name" field. You can also right-click "This PC" on Windows or open Finder on Mac and look at the sidebar — the computer name often appears there too.
Do I need to tell other people on my network about the name change?
No. The new name will appear automatically in their network browser or file-sharing windows the next time they refresh or restart their own computer. If someone is actively connected to your computer via remote access, they may need to reconnect using the new name, but otherwise the change is transparent to them.