As to logon: go to start > Control Panel > User Accounts > Change the way users log on or off
Click or unclick (if clicked) the
Use the Welcome Screen.
If your wife's cousin created a new account then you may need to delete it. Multiple user accounts will at least prompt for the user name.
As to
msconfig | startup: there is nothing listed there that is vital to XP starting itself. These are all third party applications. Of course your anti virus and firewall will be in there. As to testing you can
disable all and see how it affects the startup. After this you can always go back and individually restore the items. The list will remain even after you uncheck the items.
If for any reason you suspect any malware and or virus issues I suggest the following:
As a first response you might want to post a HijackThis log for review by our Pros in that section:
Please follow the instructions
HERE & then post your log in a new thread in the
Spyware, Adware, Viruses and HijackThis Logs section.
(
Not in this section please).
Please specify what issues you appear to be experiencing along with your log.