diff --git a/UI/Forms/BaseForm.cs b/UI/Forms/BaseForm.cs
index 23c55ab..983d955 100644
--- a/UI/Forms/BaseForm.cs
+++ b/UI/Forms/BaseForm.cs
@@ -39,6 +39,13 @@ namespace Mesen.GUI.Forms
 		{
 			bool processed = false;
 			OnProcessCmdKey?.Invoke(keyData, ref processed);
+
+			if(keyData == Keys.F10 || keyData == (Keys.F10 | Keys.Shift)) {
+				//Prevent default Windows behavior on F10 / Shift+F10 presses, which causes issues
+				//such as the Shift key not being processed as being released, etc.
+				return true;
+			}
+
 			return processed || base.ProcessCmdKey(ref msg, keyData);
 		}