The quickest way to change your username depends on your operating system
On Windows 10 or 11, you change your username through Settings > Accounts > Your info. Click "Rename your account" and type the new name you want. On a Mac, you go to System Settings > General > Users & Groups, unlock the panel with your password, right-click your account, and select "Advanced Options" to change the full name or short name. Both take about two minutes and don't require a restart.
The difference between a "full name" and a "short name" (or "account name") matters. Your full name is what appears on the login screen and in greeting messages. Your short name is the folder name on your hard drive and what appears in file paths — changing this one is more complicated and usually not necessary.
If you're on a work computer or school computer, you may not have permission to change your username. Your IT department controls these accounts. If the rename button is grayed out or missing, contact your workplace support team.
Key Takeaways
- On Windows, go to Settings > Accounts > Your info and click "Rename your account" to change the name that appears on your login screen.
- On Mac, open System Settings > General > Users & Groups, unlock the panel, and use "Advanced Options" to change your full name or short name.
- Changing your full name (display name) is straightforward and takes effect when ready without a restart.
- Changing your short name (account folder name) is more involved and usually unnecessary unless you have a specific reason to do so.
- Work and school computers often lock username changes — if you can't find the rename option, your IT department controls your account.
Windows: Renaming your full account name
Open Settings by pressing the Windows key and typing "Settings," then press Enter. Click "Accounts" in the left sidebar. On the right side, you'll see "Your info" at the top — click it. You should see your current account name displayed with a "Rename your account" button underneath.
Click that button. A text box will appear with your current name highlighted. Delete it and type your new username, then click "Next." Windows will ask you to confirm. Click "Finish" and you're done. The change takes effect when ready — you'll see the new name on your next login or in your account settings right away.
If the "Rename your account" button doesn't appear or is grayed out, your account may be managed by your workplace or school. You'll need to contact your IT support team to request the change.
Mac: Changing your full name and short name
Click the Apple menu in the top-left corner and select "System Settings." In the sidebar, click "General," then click "Users & Groups." You may see a lock icon at the bottom of the window — if so, click it and enter your password to unlock the settings.
Your account will be highlighted in the list on the left. Right-click it and select "Advanced Options." A window will open showing two fields: "Full Name" and "Account Name." The full name is what appears on your login screen and in system messages. The account name is the short folder name used in file paths and terminal commands.
Most people only need to change the full name. Click in that field, delete the old name, and type the new one. Click "OK." The change takes effect when ready. If you need to change the account name (short name), that field is also editable, but be aware that your home folder name won't change automatically — you may need to manually rename it in Finder, or contact Apple Support if you're unsure.
Why your short name and full name are different
Windows and Mac both use two different names for your account. Your full name or display name is purely cosmetic — it's what greets you when you log in and what appears in system messages. Changing it has no effect on your files or how your computer works.
Your short name or account name is the actual folder name where your files live. On Windows, this is usually something like "C:\Users\YourShortName\Documents." On Mac, it's "/Users/yourshortname/Documents." If you change this name, your file paths change too, which can break shortcuts, scripts, or programs that look for files in the old location.
For this reason, most people should only change their full name. If you have a specific reason to change your short name — for example, you set up your account with a typo years ago — you can do it, but be prepared for potential complications with older files or programs.
What happens to your files and programs when you rename
Changing your full name does not affect your files, programs, or anything else on your computer. It's purely a display change. Your Documents folder, Desktop, and all your programs will work exactly as before.
If you change your short name on a Mac, your home folder name may not update automatically. This can cause problems if you have old shortcuts or programs that reference the old path. Windows handles this more gracefully — if you change your account name, Windows usually updates the folder path for you, though some older programs may still look for the old path.
The safest approach is to change only your full name unless you have a specific technical reason to change your short name. If you do need to change your short name, back up your files first and consider contacting your computer manufacturer's support team.
If you're locked out of changing your username
On a work or school computer, your account is often managed by your organization's IT department. This means you won't see a "Rename your account" button, or it will be grayed out. You can't bypass this — it's a security measure to keep accounts consistent across the organization.
Contact your IT support team or help desk and explain that you want to change your username. They can tell you whether it's possible and what the process is. Some organizations allow it; others don't. If they do allow it, they'll either make the change for you or walk you through their specific process.
If you're on a personal computer but still can't find the rename option, make sure you're logged in with an administrator account. Standard user accounts sometimes have limited permissions. You can check this in Settings > Accounts > Your info — if it says "Administrator" under your name, you have the right permissions.
Frequently Asked Questions
Will changing my username affect my passwords or login?
No. Your password stays the same. You log in with your password, not your username. Changing your display name doesn't change how you sign in or any of your saved passwords.
Can I change my username back to the old one later?
Yes. The rename process works the same way every time. You can change your username as many times as you want. Just go back to Settings (Windows) or System Settings (Mac) and rename it again.
What if I change my short name and now programs can't find my files?
Restart your computer first — sometimes programs update their paths after a restart. If that doesn't work, you may need to reinstall the affected programs or contact their support team. This is why changing your short name is risky; consider changing it back if you're having problems.
Do I need to restart my computer after changing my username?
No. The change takes effect when ready on both Windows and Mac. You don't need to restart, though you may need to log out and back in to see the change reflected everywhere in the system.
Can I use special characters or spaces in my new username?
For your full name, yes — you can use spaces, apostrophes, and most characters. For your short name (account name), avoid spaces and special characters; stick to letters, numbers, hyphens, and underscores. Most systems handle short names better when they're straightforward.