Exchange Server setup encountered an error.

Welcome to Microsoft Exchange Server 2007 Unattended Setup

Preparing Exchange Setup

Exchange Server setup encountered an error.

This error can be caused by a halted command line install. To fix it, remove the following keys from the registry and re-run the setup

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Exchange

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange ADAccess

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange Anti-spam Update

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange Autodiscover

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange Common

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange EdgeSync

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange IMAP4

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange Management Application

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange POP3

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange Process Manager

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange System Attendant Mailbox

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange Topology

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeFDS

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeIS

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeMailboxAssistants

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeServiceHost