Installation and Configuration of MOSS 2007, Identity Not Mapped Exception - exception

Question

I am trying to install MOSS 2007. This computer already had MOSS2007 installed, we had to uninstall MOSS2007 and install it again (for various reasons).
When we install MOSS2007, the installation completed fine but the Sharepoint Products and Technologies Configuration Wizard runs into the following problem in Step 2.
Why does it not work? What is the root cause/solution?
PS: I have SQL Server 2005 already installed on the machine.
The error message is as follows -
Failed to create the configuration database
An exception of type System.Security.Principal.IdentityNotMappedException was thrown. Additional exception information: Some or all identity references could not be translated.
The eventviewer has the stack trace -
Failed to create the configuration
database. An exception of type
System.Security.Principal.IdentityNotMappedException
was thrown. Additional exception
information: Some or all identity
references could not be translated.
System.Security.Principal.IdentityNotMappedException:
Some or all identity references could
not be translated. at
System.Security.Principal.NTAccount.Translate(IdentityReferenceCollection
sourceAccounts, Type targetType,
Boolean forceSuccess) at
System.Security.Principal.NTAccount.Translate(Type
targetType) at
Microsoft.SharePoint.Administration.SPProcessIdentity.GetCurrentSecurityIdentifier()
at
Microsoft.SharePoint.Administration.SPProcessIdentity.GetCurrentSid()
at
Microsoft.SharePoint.Administration.SPProcessIdentity.Update()
at
Microsoft.SharePoint.Administration.SPApplicationPool.Update()
at
Microsoft.SharePoint.Administration.SPWebApplication.CreateDefaultInstance(SPWebService
service, Guid id, String
applicationPoolId, IdentityType
identityType, String
applicationPoolUsername, SecureString
applicationPoolPassword, String
iisServerComment, Boolean
secureSocketsLayer, String
iisHostHeader, Int32 iisPort, Boolean
iisAllowAnonymous, DirectoryInfo
iisRootDirectory, Uri defaultZoneUri,
Boolean iisEnsureNTLM, Boolean
createDatabase, String databaseServer,
String databaseName, String
databaseUsername, String
databasePassword,
SPSearchServiceInstance
searchServiceInstance, Boolean
isPaired, Boolean
autoActivateFeatures) at
Microsoft.SharePoint.Administration.SPAdministrationWebApplication.CreateDefaultInstance(SqlConnectionStringBuilder
administrationContentDatabase,
SPWebService adminService,
IdentityType identityType, String
farmUser, SecureString farmPassword)
at
Microsoft.SharePoint.Administration.SPFarm.CreateAdministrationWebService(SqlConnectionStringBuilder
administrationContentDatabase,
IdentityType identityType, String
farmUser, SecureString farmPassword)
at
Microsoft.SharePoint.Administration.SPFarm.CreateBasicServices(SqlConnectionStringBuilder
administrationContentDatabase,
IdentityType identityType, String
farmUser, SecureString farmPassword)
at
Microsoft.SharePoint.Administration.SPFarm.Create(SqlConnectionStringBuilder
configurationDatabase,
SqlConnectionStringBuilder
administrationContentDatabase,
IdentityType identityType, String
farmUser, SecureString farmPassword)
at
Microsoft.SharePoint.PostSetupConfiguration.ConfigurationDatabaseTask.CreateOrConnectConfigDb()
at
Microsoft.SharePoint.PostSetupConfiguration.ConfigurationDatabaseTask.Run()
at
Microsoft.SharePoint.PostSetupConfiguration.TaskThread.ExecuteTask()

Answer 1

You must delete the config database in SQl. But also make sure you delete the previous central admin site in IIS and delete the related app pool.