When you double-click an event log entry to view more details about the event, nothing may happen. Also, when you right-click the event and choose Properties, a blank dialog with the following message may appear:
No properties are available on this object
Click Start, Run and type:
regsvr32 els.dll
Press Enter. You should see the following message
DllRegisterServer in els.dll succeeded.
Close Event viewer and re-open it.