Hi,
its vulnerable to bypass welcome screen, i don't suggest to use this option but as you don't wants it you may either use standard method of login by hitting
CTL+ALT+DEL ,
start-> settings-> control panels-> administrative tools-> Local Security Policy-> Security Options-> Interactive Logon :do not require CTL+ALT+DEL --(Change the value to ENABLE)
or do a trick with
Start-> Settings-> Control Panel-> User Accounts
This postings provided AS IS
