brd,
There are a couple of possible fixes that come to mind for your issue. First, check your local services to see what the System Events Broker is set for. You can access the services by moving your mouse cursor up from the lower right corner of your screen and selecting Search. Type in Services and then select View local services. If it is set to Manual, change that to Automatic. You’ll need to reboot for that to take effect.
If the above solution doesn't work, the next thing you could take a look at is your registry. Access the registry by moving your mouse cursor up from the lower right corner of your screen and selecting Search. Type in Regedit and then select it. Navigate to...