SQL Server 2005 Express Installation Failed (10 Times)

This is my 10th attempt. I've uninstalled all the .net components and then reinstalled .net 2.0 and then various versions of SQL Server 2005 Express. Here's what all 10 error logs said:

Microsoft SQL Server 2005 Setup beginning at Sun Mar 16 18:26:46 2008
Process ID : 3808
c:fc0a616bb7e15d80b498fce92asetup.exe Version: 2005.90.3042.0
Running: LoadResourcesAction at: 2008/2/16 18:26:45
Complete: LoadResourcesAction at: 2008/2/16 18:26:45, returned true
Running: ParseBootstrapOptionsAction at: 2008/2/16 18:26:45
Loaded DLL:c:fc0a616bb7e15d80b498fce92axmlrw.dll Version:2.0.3609.0
Complete: ParseBootstrapOptionsAction at: 2008/2/16 18:26:46, returned false
Error: Action "ParseBootstrapOptionsAction" failed during execution. Error information reported during run:
Could not parse command line due to datastore exception.
Source File Name: utillibpersisthelpers.cpp
Compiler Timestamp: Wed Jun 14 16:30:14 2006
Function Name: writeEncryptedString
Source Line Number: 124
----------------------------------------------------------
writeEncryptedString() failed
Source File Name: utillibpersisthelpers.cpp
Compiler Timestamp: Wed Jun 14 16:30:14 2006
Function Name: writeEncryptedString
Source Line Number: 123
----------------------------------------------------------
Error Code: 0x80070002 (2)
Windows Error Text: The system cannot find the file specified.
Source File Name: cryptohelpercryptsameusersamemachine.cpp
Compiler Timestamp: Wed Jun 14 16:28:04 2006
Function Name: sqls::CryptSameUserSameMachine:rotectData
Source Line Number: 50
2
Could not skip Component update due to datastore exception.
Source File Name: datastorecachedpropertycollection.cpp
Compiler Timestamp: Wed Jun 14 16:27:59 2006
Function Name: CachedPropertyCollection::findProperty
Source Line Number: 130
----------------------------------------------------------
Failed to find property "InstallMediaPath" {"SetupBootstrapOptionsScope", "", "3808"} in cache
Source File Name: datastorepropertycollection.cpp
Compiler Timestamp: Wed Jun 14 16:28:01 2006
Function Name: SetupBootstrapOptionsScope.InstallMediaPath
Source Line Number: 44
----------------------------------------------------------
No collector registered for scope: "SetupBootstrapOptionsScope"
Running: ValidateWinNTAction at: 2008/2/16 18:26:46
Complete: ValidateWinNTAction at: 2008/2/16 18:26:46, returned true
Running: ValidateMinOSAction at: 2008/2/16 18:26:46
Complete: ValidateMinOSAction at: 2008/2/16 18:26:46, returned true
Running: PerformSCCAction at: 2008/2/16 18:26:46
Complete: PerformSCCAction at: 2008/2/16 18:26:46, returned true
Running: ActivateLoggingAction at: 2008/2/16 18:26:46
Error: Action "ActivateLoggingAction" threw an exception during execution. Error information reported during run:
Datastore exception while trying to write logging properties.
Source File Name: datastorecachedpropertycollection.cpp
Compiler Timestamp: Wed Jun 14 16:27:59 2006
Function Name: CachedPropertyCollection::findProperty
Source Line Number: 130
----------------------------------------------------------
Failed to find property "primaryLogFiles" {"SetupStateScope", "", ""} in cache
Source File Name: datastorepropertycollection.cpp
Compiler Timestamp: Wed Jun 14 16:28:01 2006
Function Name: SetupStateScope.primaryLogFiles
Source Line Number: 44
----------------------------------------------------------
No collector registered for scope: "SetupStateScope"
00DFCFC0Unable to proceed with setup, there was a command line parsing error. : 2
Error Code: 0x80070002 (2)
Windows Error Text: The system cannot find the file specified.
Source File Name: datastorepropertycollection.cpp
Compiler Timestamp: Wed Jun 14 16:28:01 2006
Function Name: SetupBootstrapOptionsScope.InstallMediaPath
Source Line Number: 44
Class not registered.
Failed to create CAB file due to datastore exception
Source File Name: datastorecachedpropertycollection.cpp
Compiler Timestamp: Wed Jun 14 16:27:59 2006
Function Name: CachedPropertyCollection::findProperty
Source Line Number: 130
----------------------------------------------------------
Failed to find property "HostSetup" {"SetupBootstrapOptionsScope", "", "3808"} in cache
Source File Name: datastorepropertycollection.cpp
Compiler Timestamp: Wed Jun 14 16:28:01 2006
Function Name: SetupBootstrapOptionsScope.HostSetup
Source Line Number: 44
----------------------------------------------------------
No collector registered for scope: "SetupBootstrapOptionsScope"
Message pump returning: 2

I'm a student and need this to work for projects. Any help will be greatly appreciated.

Bruce