Note: This description and procedure applies only to users of Windows XP Home Edition and to users of Windows XP Professional configured to link the computer to a workgroup NOT to a Domain.
To determine whether your computer is linked to a workgroup:
click Start, and then Right Click My Computer.
Click Properties from drop down menu that appears.
Click the Computer Name Tab.

To Set up a user account:
Click Start, and then click Control Panel.
Click User Accounts.
Under Pick a task, click Create a new account.
On the Name the new account page, type a name for the new account, and then click Next.
On the Pick an account type page, click the type of account you want to assign, and then click Create Account.