diff --git a/Source/CeditQt/main_window.py b/Source/CeditQt/main_window.py
index 62320df63..b278cd1c8 100644
--- a/Source/CeditQt/main_window.py
+++ b/Source/CeditQt/main_window.py
@@ -8,7 +8,7 @@
 import time
 
 from PySide6.QtCore import QProcess, QSettings, QTimer, Qt, QUrl, Signal
-from PySide6.QtGui import QAction, QDesktopServices, QFont, QFontDatabase, QPixmap
+from PySide6.QtGui import QAction, QDesktopServices, QPixmap
 from PySide6.QtWidgets import (
     QCheckBox,
     QComboBox,
@@ -56,7 +56,7 @@
 from tabs.mechanical_vents_tab import MechanicalVentsTab
 from tabs.output_tab import OutputTab
 from tabs.placeholder_tab import PlaceholderTab
-from tabs.simulation_tab import SimulationTab
+from tabs.simulation_tab import SimulationTab, fixed_width_font
 from tabs.targets_tab import TargetsTab
 from tabs.thermal_properties_tab import ThermalPropertiesTab
 from tabs.wall_vents_tab import WallVentsTab
@@ -1893,7 +1893,7 @@ def __init__(self, parent, case_name: str, simulation_time: float):
         self.errors_edit.setReadOnly(True)
         self.errors_edit.setLineWrapMode(QPlainTextEdit.LineWrapMode.NoWrap)
         self.errors_edit.setMinimumHeight(120)
-        self.errors_edit.setFont(self.fixed_width_font())
+        self.errors_edit.setFont(fixed_width_font())
 
         self.close_button = QPushButton("Close")
         self.stop_button = QPushButton("Stop")
@@ -1924,22 +1924,6 @@ def __init__(self, parent, case_name: str, simulation_time: float):
         layout.addLayout(button_layout)
         self.setLayout(layout)
 
-    @staticmethod
-    def fixed_width_font() -> QFont:
-        import matplotlib
-
-        # Use the same bundled TrueType font in the UI and headless captures.
-        font_path = Path(matplotlib.get_data_path()) / "fonts" / "ttf" / "DejaVuSansMono.ttf"
-        font_id = QFontDatabase.addApplicationFont(str(font_path))
-        families = QFontDatabase.applicationFontFamilies(font_id)
-        if not families:
-            raise RuntimeError(f"Could not load the monospace font {font_path}")
-        font = QFont(families[0], 12)
-        font.setStyleHint(QFont.StyleHint.Monospace)
-        font.setFixedPitch(True)
-        font.setStyleStrategy(QFont.StyleStrategy.PreferAntialias | QFont.StyleStrategy.PreferOutline)
-        return font
-
     def summary_headers(self) -> list[str]:
         return [
             "Compartment",
diff --git a/Source/CeditQt/tabs/simulation_tab.py b/Source/CeditQt/tabs/simulation_tab.py
index 98fa58a0f..00b9b5ce5 100644
--- a/Source/CeditQt/tabs/simulation_tab.py
+++ b/Source/CeditQt/tabs/simulation_tab.py
@@ -1,6 +1,9 @@
 from __future__ import annotations
 
 import math
+import os
+import sys
+from pathlib import Path
 
 from PySide6.QtCore import Qt
 from PySide6.QtGui import QFont, QFontDatabase, QTextCursor
@@ -34,6 +37,29 @@ def format_mass_fraction(value: float | int) -> str:
     return f"{format_number(value)} kg/kg"
 
 
+def fixed_width_font() -> QFont:
+    if sys.platform == "win32":
+        # Preserve Windows' Courier appearance without the offscreen bitmap fallback.
+        font_dir = Path(os.environ.get("WINDIR", r"C:\Windows")) / "Fonts"
+        font_path = font_dir / "cour.ttf"
+        font_id = QFontDatabase.addApplicationFont(str(font_path))
+        families = QFontDatabase.applicationFontFamilies(font_id)
+        if not families:
+            raise RuntimeError(f"Could not load Courier New TrueType font {font_path}")
+        if (font_dir / "courbd.ttf").is_file():
+            QFontDatabase.addApplicationFont(str(font_dir / "courbd.ttf"))
+        font = QFont(families[0])
+    elif "Menlo" in QFontDatabase.families():
+        font = QFont("Menlo")
+    else:
+        font = QFontDatabase.systemFont(QFontDatabase.SystemFont.FixedFont)
+    font.setPointSize(12)
+    font.setStyleHint(QFont.StyleHint.Monospace)
+    font.setFixedPitch(True)
+    font.setStyleStrategy(QFont.StyleStrategy.PreferAntialias | QFont.StyleStrategy.PreferOutline)
+    return font
+
+
 class SimulationTab(QWidget):
     def __init__(self, parent=None):
         super().__init__(parent)
@@ -66,16 +92,7 @@ def __init__(self, parent=None):
         self.message_panel.setReadOnly(True)
         self.message_panel.setLineWrapMode(QPlainTextEdit.LineWrapMode.NoWrap)
 
-        fixed_font = QFontDatabase.systemFont(QFontDatabase.SystemFont.FixedFont)
-
-        if "Menlo" in QFontDatabase.families():
-            fixed_font = QFont("Menlo")
-
-        fixed_font.setStyleHint(QFont.StyleHint.Monospace)
-        fixed_font.setFixedPitch(True)
-        fixed_font.setPointSize(12)
-
-        self.message_panel.setFont(fixed_font)
+        self.message_panel.setFont(fixed_width_font())
 
         self.message_panel.setPlainText("")
         self.message_panel.setMinimumHeight(140)