Well you can log in as the Administrator and if u made a password tyep it in if not i think from memory you can just not type the password in and continue if u have a password and a username on the already you can login to that username go into the controll panel and click on User Accounts from here you can change any password settnig u like provided u are the administrator......if i was you i would leave it on there for the sake of it this is my seccond post may i suggest not to sign up with Guru3d.com they a abuse city there...hop i helped you bye
if you go to users in control panile then go to one of the options there is says two options 1 to have the windows welcoming screen there and the 2nd one is to have the log in screen removed.