Sometimes in the Computer/Laptop, Windows is
installed already with default Username already set. For users who are not
satisfied with this and need to change this can do this using Group Policy
Editor. :
1. Open Run Dialog Box.
2. Open the Local Security Policy editor using “secpol.msc”.
3. Navigate to the tree Structure In the left pane, in Local Policies, expand it to Security Options.
4. In the right pane, there is a Policy,
Accounts: Rename administrator account, Double click over it.
5. Change the name of Admin account to the one you wish to have now.
6. Close the Local Security Policy window, Log off to save the changes.
5. Change the name of Admin account to the one you wish to have now.
6. Close the Local Security Policy window, Log off to save the changes.
Note: To make changes to this setting effective, you must log off and then log back on.