Windows xp registry

> hi,
> I am having a problem in editing my windows xp registry. Even if a
> signin from a administrator (user1) account and type Command > regedit,
> it says Registry editor is disabled by your administrator. I have
> checked in Control panel > user account, the account is an
> administrator account.
>
> Secondly, the administrator account was by default and on the windows
> logon screen I only see two accounts one administrator (user1) and the
> other in my name but it doesnot show the administrator account. Even if
> I logon by pressing ctrl+alt+del as "Administrator" (not user1) and do
> Command > Regedit, then also I get message your administrator has
> disabled the registry.
>
> Can anybody help me with this???
>
> Deepak
>