Windows logon screen

How do I get the administrative icon to appear.
When I was installing Visual C++ it wiped out the logon screen upon install
I found out spme info and used this value Larry=1
in the directiory:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
Winlogon\SpecialAccounts\UserList

The only problem is that my logon scrren looks like this
[icon] Admin
[icon] Larry
Both accounts are admin.
Deleting Larry gets rid of the logon screen
Help !


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