Done a windows update, now it wants me to log in each time I start the PC

[Xiahou]

I used Husar's method as Caravel gave his while I was typing up my second post. It's returned things to how they used to be: one account with my settings and admin control.

I would also strongly advise against having administrative (or any) user accounts with no password. Should someone ever gain illicit access to your computer, you're just making their job easier for them.