I have a dell laptop with windows 7 home premium and I got this error message.
I only have one login. Icannot log into safe mode because it is not an option when I use the F8 key.
I got to a command prompt by shutting down midstream, getting to system recovery options and picking command prompt. I used regedit to get to the profilelist key but the only items are s-1-5-18, s-1-5-19, and s-1-5-20. Thre is no key with the longer number to use the fix suggested in the registry editor.
I am not sure if I am in the built in administrator mode.