Step 1 First create a new user account in xp,through user accounts. Step 2 Go to RUN type regedit and open Code: "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\SpecialAccounts\UserList" . Step 3 In the right side you can where you see a list just right click in empty area and select a new DWORD value and rename it to your user account's name. Step 4 Just refresh the registry(F5). Wow! your account is not displayed in user accounts (nusrmgr.cpl) Step 5 Now you can't see your account in logon screen so how to access it , just press ctrl+alt+del twice a new window opens at login screen. Enter your username and password(if not set leave it blank) Warning: Backup the registry before trying this ^^ EDIT To get the account back in list, delete the DWORD value.