If you are the only defined user and have not selected a password, this is easy. Options are found in the control panel/users function. Another easy way is to make use of the MS (unsupported) utility called TweakUI which, among many other handy tools, allows you to logon with your password automatically. It bypasses the classic or welcome screens.
I have no reason to pass protect my home computer. I would like to turn the unit on and go directly to my desktop without going through the password screen. I'm sure there is an easy way to do this but I can't seem to get pass the sign-on page.