Why you might want to change your PC name

Your PC name is the identifier that appears when you connect to a network, share files with other computers, or troubleshoot connection problems. By default, Windows and Mac assign generic names like "DESKTOP-A1B2C3D4" or "MacBook-Pro-2". Changing it to something meaningful makes it easier to find your computer on a shared network, especially if you have multiple devices at home or work.

A clear PC name also helps when you're setting up printers, external drives, or other devices that need to recognize your computer. If you're selling or giving away your computer, changing the name is a small step toward removing personal identifiers before it leaves your hands.

Key Takeaways

  • Your PC name appears on networks and in device lists, and changing it takes about five minutes on either Windows or Mac.
  • On Windows 11, go to Settings > System > About, click "Rename this PC", type a new name, and restart your computer.
  • On Mac, go to System Settings > General > About, click "Edit" next to the computer name field, type a new name, and click "Rename".
  • PC names can contain letters, numbers, and hyphens, but not spaces or special characters like @, #, or &.
  • After you change your PC name, devices on your network may take a few minutes to recognize the new name.

How to rename your PC in Windows 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" at the bottom of the list.

Look for the section labeled "Device name" near the top of the About page. Click the blue "Rename this PC" button. A small window will appear with your current PC name highlighted in a text box. Delete the existing name and type your new one. Click "Next", then click "Rename" to confirm. Windows will ask you to restart your computer — you can restart now or wait until later, but the name change won't take effect until you do.

If you're using Windows 10, the process is nearly identical: go to Settings > System > About, then look for a button that says "Rename your PC" instead of "Rename this PC".

How to rename your Mac

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

You'll see a field labeled "Computer Name" near the top. Click the "Edit" button next to it, type your new name in the text box that appears, and click "Rename". The change takes effect when ready — no restart required. If you don't see an Edit button, your account may not have permission to change the computer name; ask the administrator of your Mac to make the change.

What characters and naming rules to follow

PC names can be up to 15 characters long on Windows and up to 63 characters on Mac. Use only letters (A–Z, a–z), numbers (0–9), and hyphens (-). Do not use spaces, periods, underscores, or special characters like @, #, $, %, &, or asterisks. Windows will reject a name with forbidden characters and ask you to try again.

Choose a name that's straightforward to remember and describes the computer in a way that makes sense to you — for example, "Living-Room-PC", "Kitchen-Laptop", or "Office-Mac". Avoid names that are too similar to other devices on your network, since that can cause confusion when you're looking for a specific computer.

What happens after you change your PC name

On Windows, your computer must restart for the name change to take effect. You'll see a notification asking whether you want to restart now or later. If you restart later, the new name won't appear on your network until you do.

On Mac, the change is when ready and no restart is needed. However, if your Mac is connected to a network, it may take a few minutes for other devices (like printers or network storage) to recognize the new name. If a device still shows the old name after 10 minutes, try restarting that device or reconnecting it to your network.

If you've shared files or folders with other people on your network using your old PC name, they may see a broken link or connection error until they reconnect using the new name. Let them know about the change so they can update their connections.

Troubleshooting if the rename doesn't work

If Windows won't let you rename your PC, you may not have administrator rights on your account. Ask the person who set up your computer to make the change, or contact your IT department if this is a work computer. Some workplaces lock the PC name to prevent employees from changing it.

If you see an error message saying the name is already in use, choose a different name — another computer on your network has that same name. If you're trying to change the name back to what it was before and it still won't work, restart your computer and try again.

On Mac, if the Edit button is grayed out, you're logged in with a standard user account rather than an administrator account. Switch to an administrator account or ask the Mac's owner to make the change for you.

Frequently Asked Questions

Can I use spaces in my PC name?

No. Windows and Mac both reject spaces in PC names. Use hyphens instead — for example, "My-Computer" rather than "My Computer". Some older devices on a network may also have trouble recognizing names with special characters, so hyphens are the safest choice.

Do I need to change my username too?

No. Your PC name and your user account name are separate. Changing your PC name does not change your login username or password. If you want to change your user account name, that's a different process in Settings.

Will changing my PC name affect my files or programs?

No. Your files, programs, and settings remain exactly the same. Only the name that appears on your network changes. You won't lose anything by renaming your computer.

How long does it take for other devices to see the new name?

On Windows, the change takes effect after you restart. On Mac, it's when ready. Other devices on your network may take a few minutes to update their records. If a printer or network drive still shows the old name after 10 minutes, restart that device.

Can I change my PC name back to the original?

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