diff --git a/MediaBrowser.Common.Implementations/ScheduledTasks/ScheduledTaskWorker.cs b/MediaBrowser.Common.Implementations/ScheduledTasks/ScheduledTaskWorker.cs
index 95f29915db..a4ccbb6f84 100644
--- a/MediaBrowser.Common.Implementations/ScheduledTasks/ScheduledTaskWorker.cs
+++ b/MediaBrowser.Common.Implementations/ScheduledTasks/ScheduledTaskWorker.cs
@@ -233,7 +233,7 @@ namespace MediaBrowser.Common.Implementations.ScheduledTasks
         /// <summary>
         /// The _triggers
         /// </summary>
-        private IEnumerable<ITaskTrigger> _triggers;
+        private volatile List<ITaskTrigger> _triggers;
         /// <summary>
         /// The _triggers sync lock
         /// </summary>
@@ -532,7 +532,7 @@ namespace MediaBrowser.Common.Implementations.ScheduledTasks
         /// Loads the triggers.
         /// </summary>
         /// <returns>IEnumerable{BaseTaskTrigger}.</returns>
-        private IEnumerable<ITaskTrigger> LoadTriggers()
+        private List<ITaskTrigger> LoadTriggers()
         {
             try
             {
@@ -543,12 +543,12 @@ namespace MediaBrowser.Common.Implementations.ScheduledTasks
             catch (FileNotFoundException)
             {
                 // File doesn't exist. No biggie. Return defaults.
-                return ScheduledTask.GetDefaultTriggers();
+                return ScheduledTask.GetDefaultTriggers().ToList();
             }
             catch (DirectoryNotFoundException)
             {
                 // File doesn't exist. No biggie. Return defaults.
-                return ScheduledTask.GetDefaultTriggers();
+                return ScheduledTask.GetDefaultTriggers().ToList();
             }
         }
 
diff --git a/MediaBrowser.Controller/Entities/User.cs b/MediaBrowser.Controller/Entities/User.cs
index a9e314ede1..be8521a5c4 100644
--- a/MediaBrowser.Controller/Entities/User.cs
+++ b/MediaBrowser.Controller/Entities/User.cs
@@ -109,7 +109,7 @@ namespace MediaBrowser.Controller.Entities
         /// <value>The last activity date.</value>
         public DateTime? LastActivityDate { get; set; }
 
-        private UserConfiguration _config;
+        private volatile UserConfiguration _config;
         private readonly object _configSyncLock = new object();
         [IgnoreDataMember]
         public UserConfiguration Configuration
@@ -132,7 +132,7 @@ namespace MediaBrowser.Controller.Entities
             set { _config = value; }
         }
 
-        private UserPolicy _policy;
+        private volatile UserPolicy _policy;
         private readonly object _policySyncLock = new object();
         [IgnoreDataMember]
         public UserPolicy Policy
diff --git a/MediaBrowser.Server.Implementations/Library/LibraryManager.cs b/MediaBrowser.Server.Implementations/Library/LibraryManager.cs
index 0cb5174c9a..b0b2680cac 100644
--- a/MediaBrowser.Server.Implementations/Library/LibraryManager.cs
+++ b/MediaBrowser.Server.Implementations/Library/LibraryManager.cs
@@ -222,7 +222,7 @@ namespace MediaBrowser.Server.Implementations.Library
         /// <summary>
         /// The _root folder
         /// </summary>
-        private AggregateFolder _rootFolder;
+        private volatile AggregateFolder _rootFolder;
         /// <summary>
         /// The _root folder sync lock
         /// </summary>
@@ -743,7 +743,7 @@ namespace MediaBrowser.Server.Implementations.Library
             return rootFolder;
         }
 
-        private UserRootFolder _userRootFolder;
+        private volatile UserRootFolder _userRootFolder;
         private readonly object _syncLock = new object();
         public Folder GetUserRootFolder()
         {
diff --git a/MediaBrowser.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs b/MediaBrowser.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
index ea64950abe..cd91684ce1 100644
--- a/MediaBrowser.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
+++ b/MediaBrowser.Server.Implementations/LiveTv/EmbyTV/EmbyTV.cs
@@ -239,7 +239,11 @@ namespace MediaBrowser.Server.Implementations.LiveTv.EmbyTV
 
         public Task CancelSeriesTimerAsync(string timerId, CancellationToken cancellationToken)
         {
-            var timers = _timerProvider.GetAll().Where(i => string.Equals(i.SeriesTimerId, timerId, StringComparison.OrdinalIgnoreCase));
+            var timers = _timerProvider
+                .GetAll()
+                .Where(i => string.Equals(i.SeriesTimerId, timerId, StringComparison.OrdinalIgnoreCase))
+                .ToList();
+
             foreach (var timer in timers)
             {
                 CancelTimerInternal(timer.Id);
diff --git a/MediaBrowser.Server.Implementations/LiveTv/EmbyTV/ItemDataProvider.cs b/MediaBrowser.Server.Implementations/LiveTv/EmbyTV/ItemDataProvider.cs
index f46daa6d50..b29a7562cf 100644
--- a/MediaBrowser.Server.Implementations/LiveTv/EmbyTV/ItemDataProvider.cs
+++ b/MediaBrowser.Server.Implementations/LiveTv/EmbyTV/ItemDataProvider.cs
@@ -13,7 +13,7 @@ namespace MediaBrowser.Server.Implementations.LiveTv.EmbyTV
         where T : class
     {
         private readonly object _fileDataLock = new object();
-        private List<T> _items;
+        private volatile List<T> _items;
         private readonly IJsonSerializer _jsonSerializer;
         protected readonly ILogger Logger;
         private readonly string _dataPath;