User account disappeared

[Kent Sluiter]

One of my user accounts has disappeared from the login screen. It still
exists and is listed from the dos prompt if I type net user. Also if I try
and create it again I get an already exists error.

How can I get it back on my login screen?

In case it helps it disappeared after I used control userpasswords2 from run
and tried to select power user as the account type. I have XP home and it
said this account type was not valid but now the account is hidden from the
userpasswords2 window as well as the login window.

 

[Kent Sluiter]

In case it helps I can log on to this account by pressing Cntl-Alt-Del twice
at the login screen. It then tells me it is a guest account - I presume I
need to change that setting to a normal user account but can't do so.