Disable The .Net Logon Screen

If you're the only person using your computer and you've installed Microsoft's .Net Framework upgrade, you can no longer boot into Windows without stopping at the log-in screen. To remove this step, click on the start button and type in 'control userpasswords2' then press Enter. In the 'User Accounts' dialog box, select your own log-in name and uncheck 'Users must enter a user name and password to use this computer' then click 'OK'. In the resulting dialog box, make sure that your log-in name is in the user name field and leave both password fields blank then click 'OK'.