SP2 installation progress
One or more affected files have operations pending. You should restart your computer to complete this process
After computer is restarted some additional configuration is needed. By default, users on Windows Vista and later operating systems are not members of the System Administrator role for SQL Server or Analysis Services. To add users to the System Administrator role, use the check box below to launch the SQL Server 2005 User Provisioning Tool for Windows Vista after SP2 installation completes.
Select the administrative privileges needed by Windows user SQL2005\Administrator
Now SP2 is successfully installed.