diff --git a/Source/Scheduling/ThreadOperation.cs b/Source/Scheduling/ThreadOperation.cs
index ef1b15c..4e137eb 100644
--- a/Source/Scheduling/ThreadOperation.cs
+++ b/Source/Scheduling/ThreadOperation.cs
@@ -66,10 +66,6 @@ namespace Nuclex.Support.Scheduling {
     /// <summary>Invokes the delegate passed as an argument</summary>
     /// <param name="state">Not used</param>
     private void callMethod(object state) {
-#if PROGRESSION_STARTABLE
-      OnAsyncStarted();
-#endif
-
       try {
         Execute();
       }
diff --git a/Source/Tracking/IdleStateEventArgs.cs b/Source/Tracking/IdleStateEventArgs.cs
index 9a42536..7d180e4 100644
--- a/Source/Tracking/IdleStateEventArgs.cs
+++ b/Source/Tracking/IdleStateEventArgs.cs
@@ -20,7 +20,6 @@ License along with this library
 
 using System;
 using System.Collections.Generic;
-using System.Text;
 
 namespace Nuclex.Support.Tracking {
 
diff --git a/Source/Tracking/Internal/ObservedWeightedProgression.cs b/Source/Tracking/Internal/ObservedWeightedProgression.cs
index ffd0a44..d59a92b 100644
--- a/Source/Tracking/Internal/ObservedWeightedProgression.cs
+++ b/Source/Tracking/Internal/ObservedWeightedProgression.cs
@@ -20,7 +20,6 @@ License along with this library
 
 using System;
 using System.Collections.Generic;
-using System.Text;
 
 namespace Nuclex.Support.Tracking {
 
diff --git a/Source/Tracking/ProgressUpdateEventArgs.cs b/Source/Tracking/ProgressUpdateEventArgs.cs
index f79318c..a9ff914 100644
--- a/Source/Tracking/ProgressUpdateEventArgs.cs
+++ b/Source/Tracking/ProgressUpdateEventArgs.cs
@@ -20,7 +20,6 @@ License along with this library
 
 using System;
 using System.Collections.Generic;
-using System.Text;
 
 namespace Nuclex.Support.Tracking {
 
diff --git a/Source/Tracking/Progression.cs b/Source/Tracking/Progression.cs
index 99080e3..f104b32 100644
--- a/Source/Tracking/Progression.cs
+++ b/Source/Tracking/Progression.cs
@@ -50,9 +50,6 @@ namespace Nuclex.Support.Tracking {
 
       /// <summary>Initializes a new ended dummy progression</summary>
       public EndedDummyProgression() {
-#if PROGRESSION_STARTABLE
-        OnAsyncStarted();
-#endif
         OnAsyncEnded();
       }
 
@@ -71,42 +68,14 @@ namespace Nuclex.Support.Tracking {
     /// <summary>will be triggered to report when progress has been achieved</summary>
     public event EventHandler<ProgressUpdateEventArgs> AsyncProgressUpdated;
 
-#if PROGRESSION_STARTABLE
-    /// <summary>Will be triggered when the progression has ended</summary>
-    public event EventHandler AsyncStarted;
-#endif
-
     /// <summary>Will be triggered when the progression has ended</summary>
     public event EventHandler AsyncEnded;
 
-#if PROGRESSION_STARTABLE
-    /// <summary>True when the progression has been started.</summary>
-    /// <remarks>
-    ///   This is also true if the progression has been started but is already finished.
-    ///   To find out whether the progression is running just now, use the IsRunning
-    ///   property instead.
-    /// </remarks>
-    public bool Started {
-      get { return this.started; }
-    }
-#endif
-
     /// <summary>Whether the progression has ended already</summary>
     public bool Ended {
       get { return this.ended; }
     }
 
-#if PROGRESSION_STARTABLE
-    /// <summary>Whether the progression is currently executing.</summary>
-    /// <remarks>
-    ///   This property is true when the progression is executing right at the time of
-    ///   the call (eg. when it has been started and has not ended yet).
-    /// </remarks>
-    public bool IsRunning {
-      get { return (this.started && !base.Ended); }
-    }
-#endif
-
     /// <summary>WaitHandle that can be used to wait for the progression to end</summary>
     public WaitHandle WaitHandle {
       get {
@@ -156,41 +125,6 @@ namespace Nuclex.Support.Tracking {
         copy(this, eventArguments);
     }
 
-#if PROGRESSION_STARTABLE
-    /// <summary>Fires the AsyncStarted event</summary>
-    /// <remarks>
-    ///   <para>
-    ///     This event should be fired once when the implementing class begins its
-    ///     work to indicate any observers that the process is now running.
-    ///   </para>
-    ///   <para>
-    ///     Calling this method is mandatory. Care should be taken that it is called
-    ///     exactly once and that it is called before OnAsyncEnded().
-    ///   </para>
-    /// </remarks>
-    protected virtual void OnAsyncStarted() {
-
-      // Make sure that the progression is not started more than once.
-      lock(this) {
-
-        // No double lock here as it would be an implementation fault if this exception
-        // should be triggered. There's no sense in sacrificing normal runtime speed
-        // for improved performance in a case that should never occur in the first place.
-        if(this.started)
-          throw new InvalidOperationException("The operation has already been started");
-
-        this.started = true;
-
-      }
-
-      // Fire the AsyncStarted event
-      EventHandler copy = AsyncStarted;
-      if(copy != null)
-        copy(this, EventArgs.Empty);
-
-    }
-#endif
-
     /// <summary>Fires the AsyncEnded event</summary>
     /// <remarks>
     ///   <para>
@@ -242,10 +176,6 @@ namespace Nuclex.Support.Tracking {
     ///   the WaitHandle property.
     /// </remarks>
     private volatile ManualResetEvent doneEvent;
-#if PROGRESSION_STARTABLE
-    /// <summary>Whether the operation has been started yet</summary>
-    private volatile bool started;
-#endif
     /// <summary>Whether the operation has completed yet</summary>
     private volatile bool ended;
 
diff --git a/Source/Tracking/WeightedProgression.cs b/Source/Tracking/WeightedProgression.cs
index b4442ef..b248663 100644
--- a/Source/Tracking/WeightedProgression.cs
+++ b/Source/Tracking/WeightedProgression.cs
@@ -20,7 +20,6 @@ License along with this library
 
 using System;
 using System.Collections.Generic;
-using System.Text;
 
 namespace Nuclex.Support.Tracking {