Automatic Administrator Login:

Well here's the trick which you can use to prove that Windows XP is not at all secure as multi-user operating system. Hacking the system registry from any account having access to system registry puts you in to the administrator account.

REGEDIT 4[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]"AutoAdminLogon"="1"

ANDif u cannot find "AutoAdminLogon", then right click and create a new string.name it as "AutoAdminLogon".then click and modify it, and set the string value=1