Right after installation and creating a standard account, I hid my first account ("Admin") by adding this registry key 

`HKEY_LOCAL_MACHINE\Software\Microsoft\WindowsNT\CurrentVersion\Winlogon\SpecialAccounts\UserList\Admin : REG_DWORD = 0`

Now I can't do anything because the UAC prompt does not list any users. 

Help, what do I do now?