Today I installed the patches from Microsoft together with Avast2015 Free.When I decided to reboot the PC it got stuck in either shutdown, please wait or Restart.
I read an article that stated that Avast 2015 was not compatible with the optional KB3000850.
After uninstalling this patch Avast did run without issues.
Avast has solved the issue. Before installing KB3000850 you should check if
C:\Windows\System32\drivers\aswsnx.sys should has a higher version than 1.0.2208.712
So check this version before installing this Microsoft update