Click Start >> Control Panel >> Double click User accounts then click
change an Account link then click.
On the Accounts names click the account you want to change and then
click change my name.
HTH.
Let us know.
I *think* he wants to change the word which appears on the Start button from
"Start" to something else. If so, Windows provides no way to do this, but
there are several third-party utilities that let you do this.
