RBS Installation on webFrontEnd Failed

During my installation of RBS on the Web Front End Server I have faced this error in the log file that end the installation

SOFTWARE RESTRICTION POLICY: Verifying package --> 'C:\RBS\RBS.msi' against software restriction policy

SOFTWARE RESTRICTION POLICY: C:\RBS\RBS.msi has a digital signature

SOFTWARE RESTRICTION POLICY: C:\RBS\RBS.msi is permitted to run at the 'unrestricted' authorization level.

Any idea?