SEP client displays continously that a restart is required

Hello,

I installed a managed client of SEP 12.1. RU6 MP3 on a Windows 10 (version 1511) x64 Enterprise client. After the installation of SEP it asks for a reboot but after rebooting (dosen't matter how many times) the message does not go away. Is there a fix or just back luck in my case or how this can be solfed?

Thanks for your help

Regards

Roberto