Dual boot help

First of all I apologise if this is in the wrong place, but I can't find an answer to this anywhere.
I have a laptop that starts up and gives two options for logging on in black and white (I think this is dual boot but cannot be certain). They both run xp but one is designed to log onto a network and the second a normal account. I no longer need the network log on at all and would like to remove this option so it just loads straight to my normal setup. Can anyone please help
 
Yes, get into the control panel, system, advanced system settings, advanced, startup and recovery and select the OS you want to boot into. While you are there, uncheck automatically restart
 
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