good news
yesterday spent 5 hrs on the phone with MS Support team with no much
effects. Fortunately today after about 1.5 hrs a MS Tech found the cause!!
Thanks to Nikhil Sharma it came up that one service startup type was changed
to Manual instead of Automatic after KB925902 installation. That service is
Remote Registry which is crucial to the remote features of MMC like Event
Viewer, Perf. Logs and Alerts and Device Manager
So to all people that cannot use remote MMC features mentioned above after
installation of KB925902 all over their networks: double check your domain
GPO Computer Configuration - Windows settings - Security Settings - System
Services and make sure the service Remote Registry is set to Automatic and
you'll be OK
That was the issue in our case. Thanks again and wish everybody nice weekend
and Happy Easter