At a command prompt, run the following command:

"%ProgramFiles%\Microsoft SQL Server\90\Setup Bootstrap\ARPWrapper.exe /Remove"

Uninstall the SQL Server components one at a time until all the SQL Server components are uninstalled.

Note Add or Remove Programs also runs the ARPWrapper.exe program by using the /Remove option. However, the reference to the ARPWrapper.exe program may have been deleted.

If you have uninstalled SQL Server Reporting Services, you must perform the following tasks: • Delete the Reporting Services virtual directories

Use Microsoft Internet Information Services (IIS) Manager to delete the following virtual directories: • ReportServer[$InstanceName

• Reports[$InstanceName

• Delete the ReportServer application pool

Use IIS Manager to delete the ReportServer application pool.

You can check the link http://support.microsoft.com/kb/909967