The fastest way depends on whether you know your current admin password
If you remember the password for the administrator account, you can change the username yourself in about five minutes using your computer's built-in settings. If you do not remember it, you will need to use a password reset tool or contact someone who has access to the account. The steps differ between Windows and Mac, and the method also depends on whether you are logged in as that administrator right now.
Before you start, write down the new username you want. Usernames cannot contain spaces, and most systems work best with lowercase letters and numbers only — avoid special characters like @, #, or &.
Key Takeaways
- On Windows, you change the admin username through Settings > Accounts > Your info, or through Computer Management if you are not logged in as that admin.
- On Mac, you use System Settings > General > Users & Groups, unlock the settings with your admin password, then right-click the account and select "Advanced Options."
- If you do not remember the admin password, Windows offers a password reset disk option or you can use a Microsoft account recovery; Mac requires using Recovery Mode or contacting Apple Support.
- Changing the username does not affect your files or installed programs — they stay in the same place and work the same way.
- Some programs tied to the old username may need to be reinstalled or reconfigured after the change.
Changing your admin username on Windows 10 or 11
Open Settings and go to Accounts. Click "Your info" on the left side. At the top, you will see your current username. Click "Rename your account" and type the new username you want. Click "Next," then "Finish." Windows will ask you to sign out and sign back in for the change to take effect.
If you are not currently logged in as the administrator, or if that option does not appear, use Computer Management instead. Right-click the Start button, select "Computer Management," then go to Local Users and Groups > Users. Right-click the administrator account name and select "Rename." Type the new name and press Enter. You will need to be logged in as an administrator to do this.
After the change, restart your computer. Any shortcuts or file paths that included the old username in the path will still work — Windows updates them automatically in most cases. However, if you have programs that store the username in their settings, you may need to update those manually or reinstall the program.
Changing your admin username on Mac
Open System Settings and click "General" in the sidebar. Select "Users & Groups." You may see a lock icon at the bottom of the window — click it and enter your admin password to unlock the settings. Right-click the administrator account you want to change and select "Advanced Options."
In the Advanced Options window, find the "Account name" field. This is the short username your Mac uses internally — it is different from the "Full name" field. Change the account name to what you want, then click "OK." Your Mac will ask you to restart for the change to take effect.
After restart, your files and applications will work exactly as before. The change only affects the username that appears in login screens and terminal commands. If you use iCloud or other Apple services tied to this account, those will continue to work without any additional steps.
What happens to your files and programs after the change
Your Documents, Desktop, Downloads, and other personal folders stay exactly where they are. The operating system updates the internal paths automatically, so programs can still find them. You will not lose any files, and you do not need to move anything manually.
Some programs store the username in their own settings or configuration files. Microsoft Office, Adobe Creative Suite, and some development tools are common examples. If a program stops working or shows an error about permissions after you change the username, uninstall it and reinstall it. During reinstallation, it will detect the new username and set itself up correctly.
Scheduled tasks and automated backups that reference the old username may fail silently. If you use Windows Task Scheduler or Mac's cron jobs, check those settings and update any paths that include the old username.
If you do not remember the admin password
On Windows, you have two main options. If you set up a password reset disk when you first created the account, insert that disk and use it to reset the password. If you do not have a reset disk, you can use your Microsoft account to recover access — go to the Windows login screen, click "I forgot my password," and follow the recovery steps Microsoft provides. This requires access to the email address or phone number linked to your Microsoft account.
On Mac, restart your computer and hold Command + R to enter Recovery Mode. Open Utilities > Terminal and type resetpassword, then press Enter. This opens the password reset tool. Select your admin account, enter a new password, and restart. Once you are back in, you can change the username using the steps above.
If neither of these options works, you may need to contact Apple Support (for Mac) or Microsoft Support (for Windows), or take your computer to a technician who can verify your ownership and help you regain access.
Why you might want to change your admin username
Many people change their admin username because the original one was a nickname, a temporary name, or something they no longer use. Others change it for security reasons — using a less obvious name makes it slightly harder for someone trying to guess their way into the account. Some change it when they share a computer and want a name that reflects who actually uses it.
The change is purely cosmetic from a security standpoint. A strong password matters far more than the username. However, if your current username is something like "admin" or "administrator," changing it to something less predictable is a reasonable step as part of a broader security practice.
Common problems and how to fix them
If the rename option is grayed out or does not appear, you may not be logged in as an administrator. Log out and log back in as the admin account, then try again. On Windows, if you are using a Microsoft account instead of a local account, the rename option works differently — you may need to change your Microsoft account name instead, which affects all devices signed into that account.
If a program stops working after the change, the most reliable fix is to uninstall and reinstall it. Some programs cache the username at installation time and do not update it automatically. Restarting your computer before reinstalling can also help clear out old references.
If you see permission errors when trying to access certain folders, make sure you are actually logged in as the administrator account. Right-click the folder, select Properties (Windows) or Get Info (Mac), and check the permissions. The administrator account should have "Full Control" or "Read & Write" access.
Frequently Asked Questions
Will changing the admin username affect my login password?
No. The username and password are separate. Your password stays the same — you only change what name appears on the login screen and in system settings. If you want to change your password at the same time, you can do that separately through Settings.
Can I change the admin username while other accounts are logged in?
On Windows, you should log out all other accounts first. On Mac, you can change another admin account's username while logged in as a different admin, but the change takes effect after restart. It is safest to have only the account you are changing logged in.
What if I change the username and then forget what I changed it to?
On Windows, open Settings > Accounts > Your info and you will see the current username at the top. On Mac, open System Settings > General > Users & Groups and look at the account list. You can also open Terminal and type whoami to see your current username.
Does changing the admin username affect my Microsoft or Apple account?
No. Your local computer username and your Microsoft or Apple account are separate. Changing one does not change the other. If you want to change your Microsoft or Apple account name, you do that through their websites, not through your computer settings.
Can I change the admin username on a work or school computer?
Probably not. Work and school computers are usually managed by an IT department that controls who can make changes. Contact your IT support team if you need your username changed on a managed device.