diff --git a/libse/TaskbarList.cs b/libse/TaskbarList.cs
index 79ab5b5c2..0ffef6404 100644
--- a/libse/TaskbarList.cs
+++ b/libse/TaskbarList.cs
@@ -8,7 +8,7 @@ namespace Nikse.SubtitleEdit.Core
     /// </summary>
     public static class TaskbarList
     {
-        private static readonly Lazy<bool> SupportedLazy = new Lazy<bool>(() => Environment.OSVersion.Version >= new Version(6, 1));
+        private static readonly Lazy<bool> SupportedLazy = new Lazy<bool>(() => Environment.OSVersion.Platform == PlatformID.Win32NT && Environment.OSVersion.Version >= new Version(6, 1));
         private static readonly Lazy<ITaskbarList3> TaskbarListLazy = new Lazy<ITaskbarList3>(() => (ITaskbarList3)new CLSID_TaskbarList());
 
         public static bool Supported { get { return SupportedLazy.Value; } }
diff --git a/src/Forms/AddWaveformBatch.cs b/src/Forms/AddWaveformBatch.cs
index 8f3644864..113deb707 100644
--- a/src/Forms/AddWaveformBatch.cs
+++ b/src/Forms/AddWaveformBatch.cs
@@ -319,7 +319,7 @@ namespace Nikse.SubtitleEdit.Forms
             labelProgress.Text = string.Empty;
             labelInfo.Text = string.Empty;
             progressBar1.Visible = false;
-            TaskbarList.SetProgressState(Handle, TaskbarButtonProgressFlags.NoProgress);
+            TaskbarList.SetProgressState(Owner.Handle, TaskbarButtonProgressFlags.NoProgress);
             buttonRipWave.Enabled = true;
             buttonInputBrowse.Enabled = true;
             buttonSearchFolder.Enabled = true;
@@ -342,7 +342,7 @@ namespace Nikse.SubtitleEdit.Forms
         {
             if (progressBar1.Value < progressBar1.Maximum)
                 progressBar1.Value++;
-            TaskbarList.SetProgressValue(Handle, progressBar1.Value, progressBar1.Maximum);
+            TaskbarList.SetProgressValue(Owner.Handle, progressBar1.Value, progressBar1.Maximum);
             labelProgress.Text = progressBar1.Value + " / " + progressBar1.Maximum;
         }