diff --git a/PROMS/Volian.Controls.Library/StepTabRibbon.cs b/PROMS/Volian.Controls.Library/StepTabRibbon.cs
index 1aa7aca3..f43a867d 100644
--- a/PROMS/Volian.Controls.Library/StepTabRibbon.cs
+++ b/PROMS/Volian.Controls.Library/StepTabRibbon.cs
@@ -827,8 +827,19 @@ namespace Volian.Controls.Library
 					break;
 			}
 		}
+		private ItemInfo lastItem = null;
+		private int lastStart = -1;
+		private int lastLength = -1;
+		private string lastText = null;
 		void _MyStepRTB_SelectionChanged(object sender, EventArgs e)
 		{
+			//B2019-154 This will prevent duplicate processing of the ribbon menu and refresh of step items, speeding up the editing experience
+			if (_MyStepRTB.MyItemInfo == lastItem && _MyStepRTB.SelectionStart == lastStart && _MyStepRTB.SelectionLength == lastLength && _MyStepRTB.SelectedText == lastText)
+				return;
+			lastItem = _MyStepRTB.MyItemInfo;
+			lastStart = _MyStepRTB.SelectionStart;
+			lastLength = _MyStepRTB.SelectionLength;
+			lastText = _MyStepRTB.SelectedText;
 			SetButtonAndMenuEnabling(false);
 		}
 		//void _MyStepRTB_MouseUp(object sender, MouseEventArgs e)
@@ -1536,6 +1547,36 @@ namespace Volian.Controls.Library
 				try // RHM20150506 Multiline ItemID TextBox
 				{
 					IDataObject iData = Clipboard.GetDataObject();
+					// B2019-154 clean up the Windows Clipboard - Word on Windows 10 computers seems to have placed extra information (not needed by PROMS) on the clipboard
+					if (iData.GetFormats().Length > 1)
+					{
+						DataObject myDO = new DataObject();
+						foreach (string objname in iData.GetFormats())
+						{
+							switch (objname)
+							{
+								//case "Object Descriptor":
+								//case "HTML Format":
+								case "EnhancedMetafile":
+									//case "MetaFilePict":
+									//case "Embed Source":
+									//case "Link Source":
+									//case "Link Source Descriptor":
+									//case "ObjectLink":
+									//case "HyperlinkWordBkmk":
+									//case "Hyperlink":
+									break;
+								default:
+									//case "Text":
+									//case "Rich Text Format":
+									myDO.SetData(objname, iData.GetData(objname));
+									break;
+							}
+						}
+						Clipboard.Clear();
+						Clipboard.SetDataObject(myDO); // this saves the cleaned up information to the Windows clipboard
+					}
+					iData = Clipboard.GetDataObject();
 					bool noEquationData = true;
 					// part of bug B2017-117 we were running out of window handles when printing, found this similar use of
 					// creating a new richtextbox just for some processing.  Put a Using around this to ensure the window handle