Run the command to uninstall the SQL Server components
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.