diff --git a/src/ui/Controls/AudioVisualizer.cs b/src/ui/Controls/AudioVisualizer.cs
index 30fec3dee..efcf6a178 100644
--- a/src/ui/Controls/AudioVisualizer.cs
+++ b/src/ui/Controls/AudioVisualizer.cs
@@ -11,6 +11,7 @@ using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
 using System.Windows.Forms;
 using Nikse.SubtitleEdit.Core.Forms;
+using System.Diagnostics;
 
 namespace Nikse.SubtitleEdit.Controls
 {
@@ -486,7 +487,7 @@ namespace Nikse.SubtitleEdit.Controls
 
         public void SetPosition(double startPositionSeconds, Subtitle subtitle, double currentVideoPositionSeconds, int subtitleIndex, ListView.SelectedIndexCollection selectedIndexes)
         {
-            if (TimeSpan.FromTicks(DateTime.UtcNow.Ticks - _lastMouseWheelScroll).TotalSeconds > 0.25)
+            if (TimeSpan.FromTicks(Stopwatch.GetTimestamp() - _lastMouseWheelScroll).TotalSeconds > 0.25)
             { // don't set start position when scrolling with mouse wheel as it will make a bad (jumping back) forward scrolling
                 StartPositionSeconds = startPositionSeconds;
             }
@@ -1195,7 +1196,7 @@ namespace Nikse.SubtitleEdit.Controls
             _firstMove = true;
             if (e.Button == MouseButtons.Left)
             {
-                _buttonDownTimeTicks = DateTime.UtcNow.Ticks;
+                _buttonDownTimeTicks = Stopwatch.GetTimestamp();
 
                 Cursor = Cursors.VSplit;
                 double seconds = RelativeXPositionToSeconds(e.X);
@@ -2086,7 +2087,7 @@ namespace Nikse.SubtitleEdit.Controls
             if (e.Button == MouseButtons.Left && OnSingleClick != null)
             {
                 var diff = Math.Abs(_mouseMoveStartX - e.X);
-                if (_mouseMoveStartX == -1 || _mouseMoveEndX == -1 || diff < 10 && TimeSpan.FromTicks(DateTime.UtcNow.Ticks - _buttonDownTimeTicks).TotalSeconds < 0.25)
+                if (_mouseMoveStartX == -1 || _mouseMoveEndX == -1 || diff < 10 && TimeSpan.FromTicks(Stopwatch.GetTimestamp() - _buttonDownTimeTicks).TotalSeconds < 0.25)
                 {
                     if (ModifierKeys == Keys.Shift && SelectedParagraph != null)
                     {
@@ -2326,7 +2327,7 @@ namespace Nikse.SubtitleEdit.Controls
             else
             {
                 StartPositionSeconds += delta / 256.0;
-                _lastMouseWheelScroll = DateTime.UtcNow.Ticks;
+                _lastMouseWheelScroll = Stopwatch.GetTimestamp();
                 if (_currentVideoPositionSeconds < _startPositionSeconds || _currentVideoPositionSeconds >= EndPositionSeconds)
                 {
                     OnPositionSelected?.Invoke(this, new ParagraphEventArgs(_startPositionSeconds, null));
diff --git a/src/ui/Controls/SimpleTextBox.cs b/src/ui/Controls/SimpleTextBox.cs
index 6d60a0bc0..d9667e27f 100644
--- a/src/ui/Controls/SimpleTextBox.cs
+++ b/src/ui/Controls/SimpleTextBox.cs
@@ -1,6 +1,7 @@
 using Nikse.SubtitleEdit.Core.Common;
 using Nikse.SubtitleEdit.Logic;
 using System;
+using System.Diagnostics;
 using System.Drawing;
 using System.Windows.Forms;
 
@@ -30,7 +31,7 @@ namespace Nikse.SubtitleEdit.Controls
             KeyDown += SETextBox_KeyDown;
 
             // To fix issue where WM_LBUTTONDOWN got wrong "SelectedText" (only in undocked mode)
-            GotFocus += (sender, args) => { _gotFocusTicks = DateTime.UtcNow.Ticks; };
+            GotFocus += (sender, args) => { _gotFocusTicks = Stopwatch.GetTimestamp(); };
         }
 
         private void SetAlignment()
@@ -208,7 +209,7 @@ namespace Nikse.SubtitleEdit.Controls
                 if (_dragFromThis)
                 {
                     _dragFromThis = false;
-                    var milliseconds = (DateTime.UtcNow.Ticks - _dragStartTicks) / 10000;
+                    var milliseconds = (Stopwatch.GetTimestamp() - _dragStartTicks) / 10000;
                     if (milliseconds < 400)
                     {
                         SelectionLength = 0;
@@ -337,12 +338,12 @@ namespace Nikse.SubtitleEdit.Controls
 
             if (m.Msg == WM_LBUTTONDOWN)
             {
-                var milliseconds = (DateTime.UtcNow.Ticks - _gotFocusTicks) / 10000;
+                var milliseconds = (Stopwatch.GetTimestamp() - _gotFocusTicks) / 10000;
                 if (milliseconds > 10)
                 {
                     _dragText = SelectedText;
                     _dragStartFrom = SelectionStart;
-                    _dragStartTicks = DateTime.UtcNow.Ticks;
+                    _dragStartTicks = Stopwatch.GetTimestamp();
                 }
             }
 
diff --git a/src/ui/Forms/AudioToText/VoskAudioToText.cs b/src/ui/Forms/AudioToText/VoskAudioToText.cs
index f4f6c8cee..c416773ad 100644
--- a/src/ui/Forms/AudioToText/VoskAudioToText.cs
+++ b/src/ui/Forms/AudioToText/VoskAudioToText.cs
@@ -326,7 +326,7 @@ namespace Nikse.SubtitleEdit.Forms.AudioToText
             var buffer = new byte[4096];
             _bytesWavTotal = new FileInfo(waveFileName).Length;
             _bytesWavRead = 0;
-            _startTicks = DateTime.UtcNow.Ticks;
+            _startTicks = Stopwatch.GetTimestamp();
             timer1.Start();
             using (var source = File.OpenRead(waveFileName))
             {
@@ -605,7 +605,7 @@ namespace Nikse.SubtitleEdit.Forms.AudioToText
                 return;
             }
 
-            var durationMs = (DateTime.UtcNow.Ticks - _startTicks) / 10_000;
+            var durationMs = (Stopwatch.GetTimestamp() - _startTicks) / 10_000;
             var msPerFrame = (float)durationMs / _bytesWavRead;
             var estimatedTotalMs = msPerFrame * _bytesWavTotal;
             var estimatedLeft = ProgressHelper.ToProgressTime(estimatedTotalMs - durationMs);
diff --git a/src/ui/Forms/AudioToText/VoskAudioToTextSelectedLines.cs b/src/ui/Forms/AudioToText/VoskAudioToTextSelectedLines.cs
index 41562f3a9..450237a09 100644
--- a/src/ui/Forms/AudioToText/VoskAudioToTextSelectedLines.cs
+++ b/src/ui/Forms/AudioToText/VoskAudioToTextSelectedLines.cs
@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.IO;
 using System.Linq;
 using System.Text;
@@ -227,7 +228,7 @@ namespace Nikse.SubtitleEdit.Forms.AudioToText
             var buffer = new byte[4096];
             _bytesWavTotal = new FileInfo(waveFileName).Length;
             _bytesWavRead = 0;
-            _startTicks = DateTime.UtcNow.Ticks;
+            _startTicks = Stopwatch.GetTimestamp();
             timer1.Start();
             using (var source = File.OpenRead(waveFileName))
             {
@@ -325,7 +326,7 @@ namespace Nikse.SubtitleEdit.Forms.AudioToText
                 return;
             }
 
-            var durationMs = (DateTime.UtcNow.Ticks - _startTicks) / 10_000;
+            var durationMs = (Stopwatch.GetTimestamp() - _startTicks) / 10_000;
             var msPerFrame = (float)durationMs / _bytesWavRead;
             var estimatedTotalMs = msPerFrame * _bytesWavTotal;
             var estimatedLeft = ProgressHelper.ToProgressTime(estimatedTotalMs - durationMs);
diff --git a/src/ui/Forms/AudioToText/WhisperAudioToText.cs b/src/ui/Forms/AudioToText/WhisperAudioToText.cs
index 1230ec9fd..cc4b000ae 100644
--- a/src/ui/Forms/AudioToText/WhisperAudioToText.cs
+++ b/src/ui/Forms/AudioToText/WhisperAudioToText.cs
@@ -929,7 +929,7 @@ namespace Nikse.SubtitleEdit.Forms.AudioToText
             var process = GetWhisperProcess(inputFile, model.Name, _languageCode, checkBoxTranslateToEnglish.Checked, OutputHandler);
             var sw = Stopwatch.StartNew();
             _outputText.Add($"Calling whisper ({Configuration.Settings.Tools.WhisperChoice}) with : {process.StartInfo.FileName} {process.StartInfo.Arguments}{Environment.NewLine}");
-            _startTicks = DateTime.UtcNow.Ticks;
+            _startTicks = Stopwatch.GetTimestamp();
             _videoInfo = UiUtil.GetVideoInfo(waveFileName);
             timer1.Start();
             if (!_batchMode)
@@ -1573,7 +1573,7 @@ namespace Nikse.SubtitleEdit.Forms.AudioToText
                 return;
             }
 
-            var durationMs = (DateTime.UtcNow.Ticks - _startTicks) / 10_000;
+            var durationMs = (Stopwatch.GetTimestamp() - _startTicks) / 10_000;
 
             labelElapsed.Text = new TimeCode(durationMs).ToShortDisplayString();
             if (_endSeconds <= 0 || _videoInfo == null)
diff --git a/src/ui/Forms/GenerateTransparentVideoWithSubtitles.cs b/src/ui/Forms/GenerateTransparentVideoWithSubtitles.cs
index acaeedb43..662c36adf 100644
--- a/src/ui/Forms/GenerateTransparentVideoWithSubtitles.cs
+++ b/src/ui/Forms/GenerateTransparentVideoWithSubtitles.cs
@@ -802,7 +802,7 @@ namespace Nikse.SubtitleEdit.Forms
             process.Start();
             process.BeginOutputReadLine();
             process.BeginErrorReadLine();
-            _startTicks = DateTime.UtcNow.Ticks;
+            _startTicks = Stopwatch.GetTimestamp();
             timer1.Start();
 
             while (!process.HasExited)
@@ -855,7 +855,7 @@ namespace Nikse.SubtitleEdit.Forms
                 return;
             }
 
-            var durationMs = (DateTime.UtcNow.Ticks - _startTicks) / 10_000;
+            var durationMs = (Stopwatch.GetTimestamp() - _startTicks) / 10_000;
             var msPerFrame = (float)durationMs / _processedFrames;
             var estimatedTotalMs = msPerFrame * _totalFrames;
             var estimatedLeft = ProgressHelper.ToProgressTime(estimatedTotalMs - durationMs);
diff --git a/src/ui/Forms/GenerateVideo.cs b/src/ui/Forms/GenerateVideo.cs
index e889dec84..c002bc7aa 100644
--- a/src/ui/Forms/GenerateVideo.cs
+++ b/src/ui/Forms/GenerateVideo.cs
@@ -199,7 +199,7 @@ namespace Nikse.SubtitleEdit.Forms
             process.BeginErrorReadLine();
             _totalFrames = (long)Math.Round(float.Parse(comboBoxFrameRate.Text, CultureInfo.CurrentCulture) * (float)numericUpDownDurationMinutes.Value * 60.0f);
             progressBar1.Maximum = (int)_totalFrames;
-            _startTicks = DateTime.UtcNow.Ticks;
+            _startTicks = Stopwatch.GetTimestamp();
             timer1.Start();
             while (!process.HasExited)
             {
@@ -314,7 +314,7 @@ namespace Nikse.SubtitleEdit.Forms
                 return;
             }
 
-            var durationMs = (DateTime.UtcNow.Ticks - _startTicks) / 10_000;
+            var durationMs = (Stopwatch.GetTimestamp() - _startTicks) / 10_000;
             var msPerFrame = (float)durationMs / _processedFrames;
             var estimatedTotalMs = msPerFrame * _totalFrames;
             var estimatedLeft = ProgressHelper.ToProgressTime(estimatedTotalMs - durationMs);
diff --git a/src/ui/Forms/GenerateVideoWithHardSubs.cs b/src/ui/Forms/GenerateVideoWithHardSubs.cs
index d66d4b2f4..a364b2825 100644
--- a/src/ui/Forms/GenerateVideoWithHardSubs.cs
+++ b/src/ui/Forms/GenerateVideoWithHardSubs.cs
@@ -935,7 +935,7 @@ namespace Nikse.SubtitleEdit.Forms
             process.Start();
             process.BeginOutputReadLine();
             process.BeginErrorReadLine();
-            _startTicks = DateTime.UtcNow.Ticks;
+            _startTicks = Stopwatch.GetTimestamp();
             timer1.Start();
 
             while (!process.HasExited)
@@ -965,7 +965,7 @@ namespace Nikse.SubtitleEdit.Forms
             process.Start();
             process.BeginOutputReadLine();
             process.BeginErrorReadLine();
-            _startTicks = DateTime.UtcNow.Ticks;
+            _startTicks = Stopwatch.GetTimestamp();
             timer1.Start();
 
             while (!process.HasExited)
@@ -1054,7 +1054,7 @@ namespace Nikse.SubtitleEdit.Forms
             process.Start();
             process.BeginOutputReadLine();
             process.BeginErrorReadLine();
-            _startTicks = DateTime.UtcNow.Ticks;
+            _startTicks = Stopwatch.GetTimestamp();
             timer1.Start();
 
             while (!process.HasExited)
@@ -1185,7 +1185,7 @@ namespace Nikse.SubtitleEdit.Forms
                 return;
             }
 
-            var durationMs = (DateTime.UtcNow.Ticks - _startTicks) / 10_000;
+            var durationMs = (Stopwatch.GetTimestamp() - _startTicks) / 10_000;
             var msPerFrame = (float)durationMs / _processedFrames;
             var estimatedTotalMs = msPerFrame * _totalFrames;
             var estimatedLeft = ProgressHelper.ToProgressTime(estimatedTotalMs - durationMs);
diff --git a/src/ui/Forms/Main.cs b/src/ui/Forms/Main.cs
index 7bd115b15..0cab6f10b 100644
--- a/src/ui/Forms/Main.cs
+++ b/src/ui/Forms/Main.cs
@@ -2456,7 +2456,7 @@ namespace Nikse.SubtitleEdit.Forms
         private void AutoSave(bool force = false)
         {
             if (!Configuration.Settings.General.AutoSave ||
-                DateTime.UtcNow.Ticks - _lastAutoSave < 10000 * 3000 && !force) // only check for auto save evety 3 seconds
+                Stopwatch.GetTimestamp() - _lastAutoSave < 10000 * 3000 && !force) // only check for auto save evety 3 seconds
             {
                 return;
             }
@@ -2476,7 +2476,7 @@ namespace Nikse.SubtitleEdit.Forms
 
         private void DoAutoSave()
         {
-            _lastAutoSave = DateTime.UtcNow.Ticks + 1009000;
+            _lastAutoSave = Stopwatch.GetTimestamp() + 1009000;
             var currentSubtitleHash = GetFastSubtitleHash();
             if (_changeSubtitleHash != currentSubtitleHash && _lastDoNotPrompt != currentSubtitleHash && _subtitle?.Paragraphs.Count > 0)
             {
@@ -2493,7 +2493,7 @@ namespace Nikse.SubtitleEdit.Forms
                 SaveOriginalSubtitle(GetCurrentSubtitleFormat(), true);
             }
 
-            _lastAutoSave = DateTime.UtcNow.Ticks;
+            _lastAutoSave = Stopwatch.GetTimestamp();
         }
 
         private bool ContinueNewOrExit()
@@ -2672,10 +2672,10 @@ namespace Nikse.SubtitleEdit.Forms
                 return;
             }
 
-            if ((DateTime.UtcNow.Ticks - _lastHistoryTicks) > 10000 * 500) // only if last change was longer ago than 500 milliseconds
+            if ((Stopwatch.GetTimestamp() - _lastHistoryTicks) > 10000 * 500) // only if last change was longer ago than 500 milliseconds
             {
                 MakeHistoryForUndo(description);
-                _lastHistoryTicks = DateTime.UtcNow.Ticks;
+                _lastHistoryTicks = Stopwatch.GetTimestamp();
             }
         }
 
@@ -2887,7 +2887,7 @@ namespace Nikse.SubtitleEdit.Forms
                 return;
             }
 
-            _lastAutoSave = DateTime.UtcNow.Ticks;
+            _lastAutoSave = Stopwatch.GetTimestamp();
             bool videoFileLoaded = false;
             _formatManuallyChanged = false;
             var file = new FileInfo(fileName);
@@ -6499,7 +6499,7 @@ namespace Nikse.SubtitleEdit.Forms
             ShowSourceLineNumber();
             _sourceViewChange = true;
             labelStatus.Text = string.Empty;
-            _sourceTextTicks = DateTime.UtcNow.Ticks;
+            _sourceTextTicks = Stopwatch.GetTimestamp();
         }
 
         private bool ShowProfileInStatusBar => Configuration.Settings.General.CurrentProfile != "Default";
@@ -11513,7 +11513,7 @@ namespace Nikse.SubtitleEdit.Forms
 
         private void TextBoxListViewTextKeyDown(object sender, KeyEventArgs e)
         {
-            _listViewTextTicks = DateTime.UtcNow.Ticks;
+            _listViewTextTicks = Stopwatch.GetTimestamp();
 
             if (e.Modifiers == Keys.Shift && e.KeyCode == Keys.ShiftKey)
             {
@@ -11810,7 +11810,7 @@ namespace Nikse.SubtitleEdit.Forms
             }
 
             // last key down in text
-            _lastTextKeyDownTicks = DateTime.UtcNow.Ticks;
+            _lastTextKeyDownTicks = Stopwatch.GetTimestamp();
 
             UpdatePositionAndTotalLength(labelTextLineTotal, textBoxListViewText);
         }
@@ -15205,7 +15205,7 @@ namespace Nikse.SubtitleEdit.Forms
             ShowStatus(string.Format("{0}, {1:0}%", statusMessage, _lastProgressPercent));
             statusStrip1.Refresh();
             TaskbarList.SetProgressValue(Handle, percent, 100);
-            if (DateTime.UtcNow.Ticks % 10 == 0)
+            if (Stopwatch.GetTimestamp() % 10 == 0)
             {
                 Application.DoEvents();
             }
@@ -16952,15 +16952,15 @@ namespace Nikse.SubtitleEdit.Forms
         {
             if (e.KeyCode == Keys.LWin)
             {
-                _winLeftDownTicks = DateTime.UtcNow.Ticks;
+                _winLeftDownTicks = Stopwatch.GetTimestamp();
             }
 
             if (e.KeyCode == Keys.RWin)
             {
-                _winRightDownTicks = DateTime.UtcNow.Ticks;
+                _winRightDownTicks = Stopwatch.GetTimestamp();
             }
 
-            if ((DateTime.UtcNow.Ticks - _winLeftDownTicks) <= 10000 * 999 || (DateTime.UtcNow.Ticks - _winRightDownTicks) <= 10000 * 999) // less than 999 ms
+            if ((Stopwatch.GetTimestamp() - _winLeftDownTicks) <= 10000 * 999 || (Stopwatch.GetTimestamp() - _winRightDownTicks) <= 10000 * 999) // less than 999 ms
             {
                 // if it's less than one second since Win key was pressed we ignore key (not perfect...)
                 e.SuppressKeyPress = true;
@@ -18398,7 +18398,7 @@ namespace Nikse.SubtitleEdit.Forms
                     mediaPlayer.CurrentPosition = startSeconds;
                     UiUtil.ShowSubtitle(_subtitle, mediaPlayer, GetCurrentSubtitleFormat());
                     mediaPlayer.Play();
-                    _endSecondsNewPositionTicks = DateTime.UtcNow.Ticks;
+                    _endSecondsNewPositionTicks = Stopwatch.GetTimestamp();
                 }
 
                 e.SuppressKeyPress = true;
@@ -18414,7 +18414,7 @@ namespace Nikse.SubtitleEdit.Forms
                     mediaPlayer.CurrentPosition = startSeconds;
                     UiUtil.ShowSubtitle(_subtitle, mediaPlayer, GetCurrentSubtitleFormat());
                     mediaPlayer.Play();
-                    _endSecondsNewPositionTicks = DateTime.UtcNow.Ticks;
+                    _endSecondsNewPositionTicks = Stopwatch.GetTimestamp();
                 }
 
                 e.SuppressKeyPress = true;
@@ -21033,7 +21033,7 @@ namespace Nikse.SubtitleEdit.Forms
                     labelNextWord.Text = string.Format(_language.NextX, HtmlUtil.RemoveHtmlTags(next.Text, true).Replace(Environment.NewLine, " "));
                     labelNextWord.Left = audioVisualizer.Width / 2 - labelNextWord.Width / 2 + audioVisualizer.Left;
                     labelNextWord.Visible = true;
-                    _labelNextTicks = DateTime.UtcNow.Ticks;
+                    _labelNextTicks = Stopwatch.GetTimestamp();
                 }
                 else
                 {
@@ -21231,7 +21231,7 @@ namespace Nikse.SubtitleEdit.Forms
             }
 
             _textHeightResize = splitContainerListViewAndText.Height - splitContainerListViewAndText.SplitterDistance;
-            _textHeightResizeIgnoreUpdate = DateTime.UtcNow.Ticks;
+            _textHeightResizeIgnoreUpdate = Stopwatch.GetTimestamp();
             mediaPlayer.ShowFullScreenControls();
             bool setRedockOnFullscreenEnd = false;
 
@@ -24183,7 +24183,7 @@ namespace Nikse.SubtitleEdit.Forms
                 int index = ShowSubtitle();
                 if (index != -1 && oldIndex != index && checkBoxSyncListViewWithVideoWhilePlaying.Checked)
                 {
-                    if ((DateTime.UtcNow.Ticks - _lastTextKeyDownTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
+                    if ((Stopwatch.GetTimestamp() - _lastTextKeyDownTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
                     {
                         if (_endSeconds <= 0 || !checkBoxAutoRepeatOn.Checked)
                         {
@@ -24205,7 +24205,7 @@ namespace Nikse.SubtitleEdit.Forms
                         mediaPlayer.Pause();
                         if (_playSelectionIndex < 0)
                         {
-                            if (_endSecondsNewPosition >= 0 && _endSecondsNewPositionTicks > DateTime.UtcNow.Ticks - (10000 * 900)) // 900 ms
+                            if (_endSecondsNewPosition >= 0 && _endSecondsNewPositionTicks > Stopwatch.GetTimestamp() - (10000 * 900)) // 900 ms
                             {
                                 mediaPlayer.CurrentPosition = _endSecondsNewPosition;
                             }
@@ -24329,7 +24329,7 @@ namespace Nikse.SubtitleEdit.Forms
                 }
 
 
-                if (labelNextWord.Visible && _labelNextTicks + 100000000 < DateTime.UtcNow.Ticks)
+                if (labelNextWord.Visible && _labelNextTicks + 100000000 < Stopwatch.GetTimestamp())
                 {
                     labelNextWord.Visible = false;
                 }
@@ -24367,7 +24367,7 @@ namespace Nikse.SubtitleEdit.Forms
                 Text = Text.RemoveChar('*').TrimEnd();
             }
 
-            if (InSourceView && _sourceTextTicks != -1 && (DateTime.UtcNow.Ticks - _sourceTextTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
+            if (InSourceView && _sourceTextTicks != -1 && (Stopwatch.GetTimestamp() - _sourceTextTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
             {
                 ReloadFromSourceInSourceView();
                 _sourceTextTicks = -1;
@@ -24651,7 +24651,7 @@ namespace Nikse.SubtitleEdit.Forms
                 }
             }
 
-            _textHeightResizeIgnoreUpdate = DateTime.UtcNow.Ticks;
+            _textHeightResizeIgnoreUpdate = Stopwatch.GetTimestamp();
             SubtitleListview1.AutoSizeAllColumns(this);
 
             if (WindowState == FormWindowState.Maximized ||
@@ -24684,7 +24684,7 @@ namespace Nikse.SubtitleEdit.Forms
 
         private void Main_ResizeBegin(object sender, EventArgs e)
         {
-            _textHeightResizeIgnoreUpdate = DateTime.UtcNow.Ticks;
+            _textHeightResizeIgnoreUpdate = Stopwatch.GetTimestamp();
             if (_loading)
             {
                 return;
@@ -25697,7 +25697,7 @@ namespace Nikse.SubtitleEdit.Forms
             {
                 timerAutoContinue.Stop();
 
-                if ((DateTime.UtcNow.Ticks - _lastTextKeyDownTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
+                if ((Stopwatch.GetTimestamp() - _lastTextKeyDownTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
                 {
                     labelStatus.Text = string.Empty;
                     PlayNext();
@@ -26343,7 +26343,7 @@ namespace Nikse.SubtitleEdit.Forms
             {
                 try
                 {
-                    _textHeightResizeIgnoreUpdate = DateTime.UtcNow.Ticks;
+                    _textHeightResizeIgnoreUpdate = Stopwatch.GetTimestamp();
                     _textHeightResize = splitContainerListViewAndText.Height - splitContainerListViewAndText.SplitterDistance;
                 }
                 catch
@@ -26411,7 +26411,7 @@ namespace Nikse.SubtitleEdit.Forms
                 SubtitleListview1.Focus();
             }
 
-            _lastTextKeyDownTicks = DateTime.UtcNow.Ticks;
+            _lastTextKeyDownTicks = Stopwatch.GetTimestamp();
             if (_subtitleOriginal != null && _subtitleOriginal.Paragraphs.Count > 0)
             {
                 var idx = _subtitleListViewIndex;
@@ -29732,7 +29732,7 @@ namespace Nikse.SubtitleEdit.Forms
                 return;
             }
 
-            _textHeightResizeIgnoreUpdate = DateTime.UtcNow.Ticks;
+            _textHeightResizeIgnoreUpdate = Stopwatch.GetTimestamp();
             mediaPlayer.ShowNonFullScreenControls();
 
             SaveUndockedPositions();
@@ -30091,7 +30091,7 @@ namespace Nikse.SubtitleEdit.Forms
 
         private void TextBoxListViewTextOriginalKeyDown(object sender, KeyEventArgs e)
         {
-            _listViewOriginalTextTicks = DateTime.UtcNow.Ticks;
+            _listViewOriginalTextTicks = Stopwatch.GetTimestamp();
             if (_subtitleOriginal == null || _subtitleOriginal.Paragraphs.Count < 1)
             {
                 return;
@@ -30283,7 +30283,7 @@ namespace Nikse.SubtitleEdit.Forms
             }
 
             // last key down in text
-            _lastTextKeyDownTicks = DateTime.UtcNow.Ticks;
+            _lastTextKeyDownTicks = Stopwatch.GetTimestamp();
 
             UpdatePositionAndTotalLength(labelTextOriginalLineTotal, textBoxListViewTextOriginal);
         }
@@ -31619,7 +31619,7 @@ namespace Nikse.SubtitleEdit.Forms
                 return;
             }
 
-            if ((DateTime.UtcNow.Ticks - _listViewTextTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
+            if ((Stopwatch.GetTimestamp() - _listViewTextTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
             {
                 var p = _subtitle.GetParagraphOrDefault(index);
                 if (p == null)
@@ -31713,7 +31713,7 @@ namespace Nikse.SubtitleEdit.Forms
                     return;
                 }
 
-                if ((DateTime.UtcNow.Ticks - _listViewOriginalTextTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
+                if ((Stopwatch.GetTimestamp() - _listViewOriginalTextTicks) > 10000 * 700) // only if last typed char was entered > 700 milliseconds
                 {
                     var original = Utilities.GetOriginalParagraph(index, _subtitle.Paragraphs[index], _subtitleOriginal.Paragraphs);
                     if (original != null)
@@ -34207,7 +34207,7 @@ namespace Nikse.SubtitleEdit.Forms
         {
             if (Configuration.Settings.VideoControls.WaveformFocusOnMouseEnter && audioVisualizer.WavePeaks != null && !audioVisualizer.Focused && audioVisualizer.CanFocus)
             {
-                if (Math.Abs(_lastWaveformMenuCloseTicks - DateTime.UtcNow.Ticks) > 10000 * 500) // only if last change was longer ago than 500 milliseconds
+                if (Math.Abs(_lastWaveformMenuCloseTicks - Stopwatch.GetTimestamp()) > 10000 * 500) // only if last change was longer ago than 500 milliseconds
                 {
                     audioVisualizer.Focus();
                 }
@@ -34529,7 +34529,7 @@ namespace Nikse.SubtitleEdit.Forms
 
         private void ContextMenuStripWaveformClosing(object sender, ToolStripDropDownClosingEventArgs e)
         {
-            _lastWaveformMenuCloseTicks = DateTime.UtcNow.Ticks;
+            _lastWaveformMenuCloseTicks = Stopwatch.GetTimestamp();
         }
 
         private void MenuOpened(object sender, EventArgs e)
@@ -35603,7 +35603,7 @@ namespace Nikse.SubtitleEdit.Forms
                 }
             }
 
-            var diff = DateTime.UtcNow.Ticks - _textHeightResizeIgnoreUpdate;
+            var diff = Stopwatch.GetTimestamp() - _textHeightResizeIgnoreUpdate;
             if (diff > 10_000 * 750 && // 750 ms
                 WindowState == _lastFormWindowState)
             {
@@ -35818,7 +35818,7 @@ namespace Nikse.SubtitleEdit.Forms
 
         private void SplitContainerMainSplitterMoving(object sender, SplitterCancelEventArgs e)
         {
-            _textHeightResizeIgnoreUpdate = DateTime.UtcNow.Ticks;
+            _textHeightResizeIgnoreUpdate = Stopwatch.GetTimestamp();
         }
 
         private void ApplyCustomStylesToolStripMenuItemClick(object sender, EventArgs e)
diff --git a/src/ui/Forms/Ocr/VobSubOcr.cs b/src/ui/Forms/Ocr/VobSubOcr.cs
index d1a43a40e..5c988cb06 100644
--- a/src/ui/Forms/Ocr/VobSubOcr.cs
+++ b/src/ui/Forms/Ocr/VobSubOcr.cs
@@ -32,6 +32,7 @@ using Nikse.SubtitleEdit.Core.Settings;
 using MessageBox = Nikse.SubtitleEdit.Forms.SeMsgBox.MessageBox;
 using Timer = System.Windows.Forms.Timer;
 using System.Runtime.CompilerServices;
+using System.Diagnostics;
 
 namespace Nikse.SubtitleEdit.Forms.Ocr
 {
@@ -6645,7 +6646,7 @@ namespace Nikse.SubtitleEdit.Forms.Ocr
                 {
                     if (subtitleListView1.SelectedItems.Count > 1)
                     {
-                        if (DateTime.UtcNow.Ticks - _slvSelIdxChangedTicks < 100000)
+                        if (Stopwatch.GetTimestamp() - _slvSelIdxChangedTicks < 100000)
                         {
                             _slvSelIdx = new KeyValuePair<long, int>(_slvSelIdxChangedTicks, subtitleListView1.SelectedItems[0].Index);
                             if (_changeDelayTimer == null)
@@ -6659,10 +6660,10 @@ namespace Nikse.SubtitleEdit.Forms.Ocr
                                 _changeDelayTimer.Stop();
                                 _changeDelayTimer.Start();
                             }
-                            _slvSelIdxChangedTicks = DateTime.UtcNow.Ticks;
+                            _slvSelIdxChangedTicks = Stopwatch.GetTimestamp();
                             return;
                         }
-                        _slvSelIdxChangedTicks = DateTime.UtcNow.Ticks;
+                        _slvSelIdxChangedTicks = Stopwatch.GetTimestamp();
                     }
                     _selectedIndex = subtitleListView1.SelectedItems[0].Index;
                 }
diff --git a/src/ui/Forms/Options/WordLists.cs b/src/ui/Forms/Options/WordLists.cs
index 40d2039a5..3425765b5 100644
--- a/src/ui/Forms/Options/WordLists.cs
+++ b/src/ui/Forms/Options/WordLists.cs
@@ -3,6 +3,7 @@ using Nikse.SubtitleEdit.Core.Dictionaries;
 using Nikse.SubtitleEdit.Logic;
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
 using System.Globalization;
 using System.IO;
 using System.Linq;
@@ -694,7 +695,7 @@ namespace Nikse.SubtitleEdit.Forms.Options
 
             e.SuppressKeyPress = true;
             if (TimeSpan.FromTicks(_listBoxSearchStringLastUsed.Ticks).TotalMilliseconds + 1800 <
-                TimeSpan.FromTicks(DateTime.UtcNow.Ticks).TotalMilliseconds)
+                TimeSpan.FromTicks(Stopwatch.GetTimestamp()).TotalMilliseconds)
             {
                 _listBoxSearchString = string.Empty;
             }
@@ -866,7 +867,7 @@ namespace Nikse.SubtitleEdit.Forms.Options
 
             e.SuppressKeyPress = true;
             if (TimeSpan.FromTicks(_listBoxSearchStringLastUsed.Ticks).TotalMilliseconds + 1800 <
-                TimeSpan.FromTicks(DateTime.UtcNow.Ticks).TotalMilliseconds)
+                TimeSpan.FromTicks(Stopwatch.GetTimestamp()).TotalMilliseconds)
             {
                 _listBoxSearchString = string.Empty;
             }
@@ -902,7 +903,7 @@ namespace Nikse.SubtitleEdit.Forms.Options
 
             e.SuppressKeyPress = true;
             if (TimeSpan.FromTicks(_listBoxSearchStringLastUsed.Ticks).TotalMilliseconds + 1800 <
-                TimeSpan.FromTicks(DateTime.UtcNow.Ticks).TotalMilliseconds)
+                TimeSpan.FromTicks(Stopwatch.GetTimestamp()).TotalMilliseconds)
             {
                 _listBoxSearchString = string.Empty;
             }
diff --git a/src/ui/Logic/UiUtil.cs b/src/ui/Logic/UiUtil.cs
index 18be2a3ea..589da70e2 100644
--- a/src/ui/Logic/UiUtil.cs
+++ b/src/ui/Logic/UiUtil.cs
@@ -67,7 +67,7 @@ namespace Nikse.SubtitleEdit.Logic
             return LibMpvDynamic.GetVideoInfo(fileName);
         }
 
-        private static long _lastShowSubTicks = DateTime.UtcNow.Ticks;
+        private static long _lastShowSubTicks = Stopwatch.GetTimestamp();
         private static int _lastShowSubHash;
 
         public static int ShowSubtitle(Subtitle subtitle, VideoPlayerContainer videoPlayerContainer, SubtitleFormat format)
@@ -115,7 +115,7 @@ namespace Nikse.SubtitleEdit.Logic
 
         private static void TimeOutRefresh(Subtitle subtitle, VideoPlayerContainer videoPlayerContainer, SubtitleFormat format, Paragraph p = null)
         {
-            if (DateTime.UtcNow.Ticks - _lastShowSubTicks > 10000 * 1000) // more than 1+ seconds ago
+            if (Stopwatch.GetTimestamp() - _lastShowSubTicks > 10000 * 1000) // more than 1+ seconds ago
             {
                 var newHash = subtitle.GetFastHashCode(string.Empty);
                 if (newHash != _lastShowSubHash)
@@ -124,7 +124,7 @@ namespace Nikse.SubtitleEdit.Logic
                     _lastShowSubHash = newHash;
                 }
 
-                _lastShowSubTicks = DateTime.UtcNow.Ticks;
+                _lastShowSubTicks = Stopwatch.GetTimestamp();
             }
         }
 
diff --git a/src/ui/Logic/WindowsHelper.cs b/src/ui/Logic/WindowsHelper.cs
index e2b839e87..92b6e862a 100644
--- a/src/ui/Logic/WindowsHelper.cs
+++ b/src/ui/Logic/WindowsHelper.cs
@@ -1,4 +1,4 @@
-using System;
+using System.Diagnostics;
 using Nikse.SubtitleEdit.Core.Common;
 
 namespace Nikse.SubtitleEdit.Logic
@@ -14,10 +14,10 @@ namespace Nikse.SubtitleEdit.Logic
                 return;
             }
 
-            if (DateTime.UtcNow.Ticks - _lastCall > 10_000_000 * 60) // one minute
+            if (Stopwatch.GetTimestamp() - _lastCall > 10_000_000 * 60) // one minute
             {
                 NativeMethods.SetThreadExecutionState(NativeMethods.ES_CONTINUOUS | NativeMethods.ES_SYSTEM_REQUIRED);
-                _lastCall = DateTime.UtcNow.Ticks;
+                _lastCall = Stopwatch.GetTimestamp();
             }
         }
     }