Problems installing SQL 2008 on Windows XP SP3


I am trying to install SQL server 2008 on a Windows XP machine.  I checked all hardware requirements, and all seems fine.  When I try to install it, I get this error:

Unhandled exception has occurred in your application.  If you click Continue, the application will ignore this error and attempt to continue.  If you click Quite, the application will close immediately.
An error occurred creating the configuration section handler for userSettings/Microsoft.SqlServer.Configuration.LandingPage.Properties.Settings: Could not load file or assembly 'System, Version=, Culture=neutral, PublicKeyToken=b77a5c561934e089' or one of it's dependencies.  The system will not find the file specified. (C:\Documents and Settings\s4Test\Local Settings\Application Data\Microsoft_Corporation\LandingPage.exe_StrongName_ryspccglax
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You must install Microsoft .NET Framework 3.5 SP1 before installing MS SQL Server 2008
NerishaBAuthor Commented:
I have installed the .Net Framework.  I have also installed the .Net 4 framework as well.  Should I remove it fisrt, then install?
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Raja Jegan RSQL Server DBA & Architect, EE Solution GuideCommented:
If you have any incomplete installations, then kindly uninstall it and then install Software pre-requisites like

* Windows Installer 4.5
* .Net Framework 3.5 with SP2

and then try which should work.
Raja Jegan RSQL Server DBA & Architect, EE Solution GuideCommented:
* typo, it should be .Net Framework 3.5 with SP1
Probably this is a Microsoft .Net-related error, please restart your computer and try again.
NerishaBAuthor Commented:
I have installed the Windows Installer 4.5 and the .Net Framework 3.5 SP1.  When I install it now, I get an error saying: "SQL Server setup has encountered the following error: Object reference not set to an instance of an object."
Raja Jegan RSQL Server DBA & Architect, EE Solution GuideCommented:
Do you have any other edition of SQL Server installed in your machine.
NerishaBAuthor Commented:
I had SQL 2000 (connectivity only) previously installed.  Could that be the cause of the problem?
Yes, If you have your SQL Server 2000 installation source, uninstall it and try installing SQL Server 2008 again.

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NerishaBAuthor Commented:
I have uninstalled SQL 2000, and I was then able to successfully install SQL 2008.  Thank you very much
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Microsoft SQL Server 2008

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