Missing DLL during installation

XP PRO SP2

I downloaded and installed SQL Server 2005 Express with Advanced Services (9.0.3042.0). The installation appeared to complete successfully and I looked at various options of Management Studio. After exiting, rebooting, and restarting Management Studio, I got the message, (paraphrased) Management Studio failed to initiate - terminating. After using Add/Remove to remove all installed components, I reran the installation. I got two error messages indicating that xpstar90.dll is missing. Did not see these messages during the first install.

Log SQL0003_mycomputername_SQL contains these errors:

Error Code: 17750
MSI (s) (94!58) [18:24:53:031]: Product: Microsoft SQL Server 2005 -- Error 29521. SQL Server Setup failed to execute a command for server configuration. The error was [Microsoft][SQL Native Client][SQL Server]Could not load the DLL xpstar90.dll, or one of the DLLs it references. Reason: 2(The system cannot find the file specified.).. Refer to the server error logs and Setup logs for detailed error information.

Error 29521. SQL Server Setup failed to execute a command for server configuration. The error was [Microsoft][SQL Native Client][SQL Server]Could not load the DLL xpstar90.dll, or one of the DLLs it references. Reason: 2(The system cannot find the file specified.).. Refer to the server error logs and Setup logs for detailed error information.

SQL_ERROR (-1) in OdbcStatement::execute_batch
sqlstate=42000, level=16, state=1, native_error=17750, msg=[Microsoft][SQL Native Client][SQL Server]Could not load the DLL xpstar90.dll, or one of the DLLs it references. Reason: 2(The system cannot find the file specified.).
sqlstate=42000, level=16, state=1, native_error=14658, msg=[Microsoft][SQL Native Client][SQL Server]Failed to retrieve SQLPath for syssubsystems population.

Error Code: 0x80074556 (17750)
Windows Error Text: Source File Name: lib\odbc_statement.h
Compiler Timestamp: Wed Jun 14 16:28:15 2006
Function Name: OdbcStatement::execute_batch@.sysdbupg.sql@.113
Source Line Number: 91

Log SQL0003_mycomputername_Core reported:

Error: Action "LaunchLocalBootstrapAction" threw an exception during execution. Error information reported during run:
"c:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\setup.exe" finished and returned: 17750
Aborting queue processing as nested installer has completed
Message pump returning: 17750

Log SQL003_mycomputername_Core(Local) reported:

Action: "UninstallForMSDE2000Action" will be marked as failed due to the following condition:
Condition "sql was successfully upgraded." returned false. Condition context:
sql failed to upgrade and so the uninstall of the upgraded product will not occur.
Installation of package: "patchMSDE2000" failed due to a precondition.
Error: Action "UninstallForSQLAction" failed during execution. Error information reported during run:
Action: "UninstallForSQLAction" will be marked as failed due to the following condition:
Condition "sql was successfully upgraded." returned false. Condition context:
sql failed to upgrade and so the uninstall of the upgraded product will not occur.
Installation of package: "patchLibertySql" failed due to a precondition.
Skipped: UninstallForRS2000Action
Skipped: Action "UninstallForRS2000Action" was not run. Information reported during analysis:
Action: "UninstallForRS2000Action" will be skipped due to the following condition:
Condition "Action: InstallRSAction was skipped." returned true.
Error: Action "ExposeVistaClusteredResources" failed during execution. Error information reported during run:
Action: "ExposeVistaClusteredResources" will be marked as failed due to the following condition:
Condition "The Clustered SQL Server instance that hosts is installed." returned false.
Running: ReportChainingResults at: 2007/8/11 18:27:5
Error: Action "ReportChainingResults" threw an exception during execution.
One or more packages failed to install. Refer to logs for error details. : 17750
Error Code: 0x80074556 (17750)
Windows Error Text: Source File Name: sqlchaining\sqlchainingactions.cpp
Compiler Timestamp: Thu Nov 16 20:31:57 2006
Function Name: sqls::ReportChainingResults:erform
Source Line Number: 3521

- Context --
sqls::HostSetupPackageInstallerSynch:ostCommit
sqls::HighlyAvailablePackage:reInstall
led due to cancel code received from cancel source: 29539

Error: Failed to add file :"C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\LOG\Files\SQLSetup0003_DCHJL761_.NET Framework 2.0.log" to cab file : "C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\LOG\SqlSetup0003.cab" Error Code : 2
Running: UploadDrWatsonLogAction at: 2007/8/11 18:29:5
Message pump returning: 17750

No other log contained a related error message.

A third attempt to install resulted in a Failure to create database files.

I see that I should have posted this in the SQL Express Setup and Upgrade forum. I've reposted there.