Windows 8 Firewall Control shows the blocked events immediately, reason of the blocking is specified precisely. So if an application is blocked (accidentally over-blocked and does not work properly therefore), the blocking details help to realize the problem. In that case, you can choose (re-apply) a more proper zone to the application, edit the zone with Zone Editor, patch the zone to enable a specific activity with assistance of the Blocked Events tab (Plus or Network/Cloud Edition only) manually.