The fastest way to change your username

Open the Control Panel, go to User Accounts, select your account, and click "Change your account name" — the whole process takes about two minutes. Windows 8.1 stores your username in two places: the local account name that appears on the login screen, and the user folder name on your hard drive. Changing the account name through Control Panel updates the login screen name when ready, but the folder name stays the same unless you rename it separately.

If you use a Microsoft account to sign in (the kind that syncs your settings across devices), changing the username in Control Panel only changes the display name — your actual Microsoft account email stays tied to your computer. The steps below work for local accounts, which are the ones most people use on a single home computer.

Key Takeaways

  • The Control Panel method changes your login screen name in minutes and works for local accounts on Windows 8.1.
  • Your user folder name (the one in C:\Users\) does not change automatically and may need to be renamed separately if you want it to match your new username.
  • Microsoft accounts show a display name in Control Panel, but the underlying email address remains your actual account identifier.
  • You need administrator rights to change any username on the computer.

Step 1: Open Control Panel and find User Accounts

Right-click the Start button (the Windows logo in the bottom left corner) and select "Control Panel" from the menu. If the Start button does not appear, move your mouse to the bottom left corner of the screen until it shows up.

In Control Panel, look for "User Accounts" — it may be under a category called "User Accounts and Family Safety" depending on your view settings. Click on "User Accounts" to open it.

Step 2: Select your account and click the rename option

You will see a list of accounts on the computer. Click on the account you want to rename. Below the account name, you will see a link that says "Change your account name" — click it.

A small dialog box will appear with a text field containing your current username. Delete the old name and type the new one. The new name can be up to 20 characters and can include spaces, but Windows will not accept special characters like asterisks, question marks, or forward slashes.

Step 3: Confirm the change and restart

Click the "Rename" button to save your new username. Windows will ask you to confirm — click "Yes" or "OK" depending on which dialog appears. Your new username will show on the login screen the next time you restart your computer or sign out and back in.

You do not have to restart when ready. The change takes effect as soon as you close the Control Panel window, but the login screen will not show the new name until you sign out or restart.

What happens to your user folder after you change the username

When you change your username in Control Panel, Windows updates the name that appears on the login screen and in the Start menu, but the folder in C:\Users\ keeps its original name. For example, if your old username was "Sarah" and you change it to "Sarah Chen", the login screen shows "Sarah Chen" but your files are still in C:\Users\Sarah\.

This does not cause problems — Windows knows where to find your files regardless of what the folder is called. However, if you want the folder name to match your new username, you can rename it manually. Right-click the folder in File Explorer, select "Rename", and type the new name. You may need to sign out first, and Windows may ask for administrator permission.

Renaming the folder is optional. Many people leave it as is because changing it offers no practical benefit and carries a small risk of breaking shortcuts or program settings if something goes wrong during the rename.

Changing a Microsoft account display name instead

If you sign in with a Microsoft account (an email address and password that syncs across multiple devices), the process is slightly different. Open Control Panel, go to User Accounts, and click on your account. You will see "Change your account name" — but this only changes the display name that appears in the Start menu and on the login screen.

Your actual Microsoft account email address does not change. Windows still uses that email to sign you in, sync your settings, and connect to OneDrive and other Microsoft services. If you want to change the email address itself, you need to go to account.microsoft.com in a web browser, sign in, and change it there — that is a separate process from changing the display name on your computer.

Troubleshooting: what to do if you cannot rename the account

If the "Change your account name" link is grayed out or does not appear, you do not have administrator rights on that account. Ask whoever set up the computer to change the username for you, or ask them to give your account administrator rights first.

If you are the only person on the computer and cannot remember the administrator password, you can create a new administrator account using the Windows 8.1 setup screen, but that is a more involved process. Contact Microsoft Support or a local computer repair shop if you are stuck.

Frequently Asked Questions

Will changing my username affect my files or programs?

No. Your files stay in the same place, and programs continue to work normally. The username change only affects what appears on the login screen and in the Start menu. Windows keeps track of your files by their location, not by the username.

Can I change my username back to the old one?

Yes, follow the same steps and type your old username. There is no limit to how many times you can change it. However, if you renamed the user folder in C:\Users\, you would need to rename that folder back separately.

What if I share the computer with other people?

Each person has their own account and can change their own username without affecting anyone else. You can only change the username for your own account unless you have administrator rights on the computer.

Does changing the username change my password?

No. Your password stays the same. If you want to change your password at the same time, go to Control Panel, User Accounts, and look for "Change your password" — it is a separate option below "Change your account name".