This document addresses problems caused by the local security setting "Sharing and security model for local accounts" being set to Guest Only. In Windows XP, this configuration is also referred to as 'Use simple file sharing'; in Windows Vista and higher, 'Use Sharing Wizard'.
"Sharing and security model for local accounts" is a setting which, if set to Guest Only, forces all incoming network file sharing connections to authenticate as "guest". If this is set to Guest Only, the installation will fail, as the installation requires administrator privileges. This does not apply if the computer is part of a domain.
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To configure the setting