Most network related tasks must be performed by an administrator. An administrator account does exist by default. However, to increase security, it is usually recommended that you rename the administrator account to something else and create your own user account to log on with.
Once you have your own account, you can add it to the built-in administrators group to give yourself the necessary permissions to perform network related tasks (as well as other system tasks). In Windows XP, you can do so using the following steps:
1.Right click My Computer and click Manage.
2.Expand Local Users and Groups.
3.Highlight Groups and double click Administrators in the details pane.
4.Click Add. Enter the name of the user you want to add to the group. Click OK.
The user account you just added to the administrators group will now be able to perform network related tasks on the computer.