add try/catch around service check

MediaBrowser.ServerApplication/MainStartup.cs

@@ -195,6 +195,8 @@ namespace MediaBrowser.ServerApplication
         }
 
         private static bool IsAlreadyRunningAsService(string applicationPath)
+        {
+            try
             {
                 var serviceName = BackgroundService.GetExistingServiceName();
 
@@ -220,6 +222,11 @@ namespace MediaBrowser.ServerApplication
                         return true;
                     }
                 }
+            }
+            catch (COMException)
+            {
+                // Catch errors thrown due to WMI not being initialized
+            }
 
             return false;
         }