If you want to bypass the Welcome screen, try this:
From Start>Run type in
control userpasswords2
then uncheck 'Users must enter a user name and password to use this
computer' and click 'Apply'. On the next screen - 'Automatically Log On' -
delete the name 'Administrator' from the User name box and enter your
account name and then the password in the next two boxes. OK your way out
and then reboot your system.
In Control Panel click User Accounts and click Change the way user log on
and off. uncheck Use Welcome Screen and click Apply Options. Now you will
not have to go through Welcome Screen.