Windows XP Tips: Unhide Administrator

Few  people  are  aware  of  Windows  XP's  cloaked  administrator  account  (called, appropriately enough, "Administrator"). This account is invisible unless either your system  has  no  other  accounts  or  you  are  booting  in  Safe  Mode.

To  remove Administrator's camouflage and add it to XP's Welcome screen, navigate to & select HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\Winlogon\SpecialAccounts\UserList  in  the  Registry  Editor,  and  double-click  the Administrator icon in the right pane. If you don't see this icon, right-click in the pane, choose New, DWORD Value, name it Administrator, and press Enter. Type 1 in the 'Value  data'  box,  and  press  <Enter>.  

From  now  on,  when  you  open  the  User Accounts window via the Control Panel, you'll see the Administrator account. You can easily change its picture or give it a password. In addition, the next time you see the Welcome screen, your Administrator account will be visible, along with the entire computer's other user accounts.

"Windows  XP Tips: Unhide Administrator"

Reference : techpraveen.com