there is a little utility called tweakui from microsoft ( they dont support it, because its not something they want to support or something like that ) that the people who developed the windows operating system had continued development for. they call it "power toys" ... you can download it from microsoft, just search for it on their website. should find it easily. now, after installing it ( about 2 minutes if i recall correctly ) it is installed in the control panel. run it, should be a users tab... or maybe its under logon. i dont have it installed on this computer ( its my brothers, and he doesnt like me installing stuff or changing settings ) ... so im not sure...
maybe there are other users of this power toy that can help you further, but i recall seeing an option for "logging on automatically" ... good luck.