diff --git a/CppRuleSet.ruleset b/CppRuleSet.ruleset
index 118e06707e..9468ec2c36 100644
--- a/CppRuleSet.ruleset
+++ b/CppRuleSet.ruleset
@@ -22,7 +22,7 @@
     <Rule Id="C26454" Action="Info" />
     <Rule Id="C26478" Action="Info" />
     <Rule Id="C26479" Action="Info" />
-    <Rule Id="C26495" Action="Info" />
+    <Rule Id="C26495" Action="Error" />
     <Rule Id="C26498" Action="Info" />
     <Rule Id="C26800" Action="Info" />
     <Rule Id="C26810" Action="Info" />
diff --git a/src/modules/MeasureTool/MeasureToolCore/ScreenCapturing.cpp b/src/modules/MeasureTool/MeasureToolCore/ScreenCapturing.cpp
index 6b62b2db59..d1dae37ea4 100644
--- a/src/modules/MeasureTool/MeasureToolCore/ScreenCapturing.cpp
+++ b/src/modules/MeasureTool/MeasureToolCore/ScreenCapturing.cpp
@@ -35,7 +35,7 @@ class D3DCaptureState final
     winrt::IDirect3DDevice device;
     winrt::com_ptr<IDXGISwapChain1> swapChain;
 
-    winrt::SizeInt32 frameSize;
+    winrt::SizeInt32 frameSize{};
     HMONITOR monitor = {};
     winrt::DirectXPixelFormat pixelFormat;
 
diff --git a/src/modules/ShortcutGuide/ShortcutGuide/d2d_window.h b/src/modules/ShortcutGuide/ShortcutGuide/d2d_window.h
index ac2f44ab06..b062962d28 100644
--- a/src/modules/ShortcutGuide/ShortcutGuide/d2d_window.h
+++ b/src/modules/ShortcutGuide/ShortcutGuide/d2d_window.h
@@ -49,7 +49,8 @@ protected:
     bool hidden = true;
     bool initialized = false;
     HWND hwnd;
-    UINT window_width, window_height;
+    UINT window_width{};
+    UINT window_height{};
     winrt::com_ptr<ID3D11Device> d3d_device;
     winrt::com_ptr<IDXGIDevice> dxgi_device;
     winrt::com_ptr<IDXGIFactory2> dxgi_factory;
diff --git a/src/modules/ShortcutGuide/ShortcutGuide/shortcut_guide.h b/src/modules/ShortcutGuide/ShortcutGuide/shortcut_guide.h
index 3fde8bf7a3..053e02766d 100644
--- a/src/modules/ShortcutGuide/ShortcutGuide/shortcut_guide.h
+++ b/src/modules/ShortcutGuide/ShortcutGuide/shortcut_guide.h
@@ -58,7 +58,7 @@ private:
         static inline PCWSTR name = L"overlay_opacity";
         int value;
         int resourceId = IDS_SETTING_DESCRIPTION_OVERLAY_OPACITY;
-    } overlayOpacity;
+    } overlayOpacity{};
 
     struct Theme
     {
diff --git a/src/modules/ShortcutGuide/ShortcutGuide/tasklist_positions.h b/src/modules/ShortcutGuide/ShortcutGuide/tasklist_positions.h
index a1160fd16a..4ac5bed8a9 100644
--- a/src/modules/ShortcutGuide/ShortcutGuide/tasklist_positions.h
+++ b/src/modules/ShortcutGuide/ShortcutGuide/tasklist_positions.h
@@ -8,7 +8,11 @@
 struct TasklistButton
 {
     std::wstring name;
-    long x, y, width, height, keynum;
+    long x{};
+    long y{};
+    long width{};
+    long height{};
+    long keynum{};
 };
 
 class Tasklist
diff --git a/src/modules/fancyzones/FancyZonesLib/EditorParameters.cpp b/src/modules/fancyzones/FancyZonesLib/EditorParameters.cpp
index 92eb1d7da4..26397eb1ba 100644
--- a/src/modules/fancyzones/FancyZonesLib/EditorParameters.cpp
+++ b/src/modules/fancyzones/FancyZonesLib/EditorParameters.cpp
@@ -25,15 +25,15 @@ namespace JsonUtils
         std::wstring monitorName;
         std::wstring monitorInstanceId;
         std::wstring monitorSerialNumber;
-        int monitorNumber;
+        int monitorNumber{};
         std::wstring virtualDesktop;
-        int dpi;
-        int top;
-        int left;
-        int workAreaWidth;
-        int workAreaHeight;
-        int monitorWidth;
-        int monitorHeight;
+        int dpi{};
+        int top{};
+        int left{};
+        int workAreaWidth{};
+        int workAreaHeight{};
+        int monitorWidth{};
+        int monitorHeight{};
         bool isSelected = false;
 
         static json::JsonObject ToJson(const MonitorInfo& monitor)
@@ -60,8 +60,8 @@ namespace JsonUtils
 
     struct EditorArgs
     {
-        DWORD processId;
-        bool spanZonesAcrossMonitors;
+        DWORD processId{};
+        bool spanZonesAcrossMonitors{};
         std::vector<MonitorInfo> monitors;
 
         static json::JsonObject ToJson(const EditorArgs& args)
diff --git a/src/modules/fancyzones/FancyZonesLib/FancyZonesData/CustomLayouts.cpp b/src/modules/fancyzones/FancyZonesLib/FancyZonesData/CustomLayouts.cpp
index 9ad60f0044..6080c7ed8c 100644
--- a/src/modules/fancyzones/FancyZonesLib/FancyZonesData/CustomLayouts.cpp
+++ b/src/modules/fancyzones/FancyZonesLib/FancyZonesData/CustomLayouts.cpp
@@ -102,7 +102,7 @@ namespace JsonUtils
     
     struct CustomLayoutJSON
     {
-        GUID layoutId;
+        GUID layoutId{};
         FancyZonesDataTypes::CustomLayoutData data;
 
         static std::optional<CustomLayoutJSON> FromJson(const json::JsonObject& json)
diff --git a/src/modules/fancyzones/FancyZonesLib/FancyZonesDataTypes.h b/src/modules/fancyzones/FancyZonesLib/FancyZonesDataTypes.h
index 41d26ca194..847b24547c 100644
--- a/src/modules/fancyzones/FancyZonesLib/FancyZonesDataTypes.h
+++ b/src/modules/fancyzones/FancyZonesLib/FancyZonesDataTypes.h
@@ -36,8 +36,8 @@ namespace FancyZonesDataTypes
 
     struct CanvasLayoutInfo
     {
-        int lastWorkAreaWidth;
-        int lastWorkAreaHeight;
+        int lastWorkAreaWidth{};
+        int lastWorkAreaHeight{};
 
         struct Rect
         {
@@ -47,7 +47,7 @@ namespace FancyZonesDataTypes
             int height;
         };
         std::vector<CanvasLayoutInfo::Rect> zones;
-        int sensitivityRadius;
+        int sensitivityRadius{};
     };
 
     struct GridLayoutInfo
@@ -95,29 +95,29 @@ namespace FancyZonesDataTypes
         std::vector<int> m_rowsPercents;
         std::vector<int> m_columnsPercents;
         std::vector<std::vector<int>> m_cellChildMap;
-        bool m_showSpacing;
-        int m_spacing;
-        int m_sensitivityRadius;
+        bool m_showSpacing{};
+        int m_spacing{};
+        int m_sensitivityRadius{};
     };
 
     struct CustomLayoutData
     {
         std::wstring name;
-        CustomLayoutType type;
+        CustomLayoutType type{};
         std::variant<CanvasLayoutInfo, GridLayoutInfo> info;
     };
 
     struct ZoneSetData
     {
         std::wstring uuid;
-        ZoneSetLayoutType type;
+        ZoneSetLayoutType type{};
     };
 
     struct DeviceId
     {
         std::wstring id;
         std::wstring instanceId;
-        int number;
+        int number{};
 
         bool isDefault() const noexcept;
         std::wstring toString() const noexcept;
@@ -125,7 +125,7 @@ namespace FancyZonesDataTypes
 
     struct MonitorId
     {
-        HMONITOR monitor;
+        HMONITOR monitor{};
         DeviceId deviceId;
         std::wstring serialNumber;
 
@@ -135,7 +135,7 @@ namespace FancyZonesDataTypes
     struct WorkAreaId
     {
         MonitorId monitorId;
-        GUID virtualDesktopId;
+        GUID virtualDesktopId{};
 
         std::wstring toString() const noexcept;
     }; 
@@ -152,10 +152,10 @@ namespace FancyZonesDataTypes
     struct DeviceInfoData
     {
         ZoneSetData activeZoneSet;
-        bool showSpacing;
-        int spacing;
-        int zoneCount;
-        int sensitivityRadius;
+        bool showSpacing{};
+        int spacing{};
+        int zoneCount{};
+        int sensitivityRadius{};
     };
 
     inline bool operator==(const ZoneSetData& lhs, const ZoneSetData& rhs)
diff --git a/src/modules/fancyzones/FancyZonesLib/JsonHelpers.h b/src/modules/fancyzones/FancyZonesLib/JsonHelpers.h
index 56df116032..c79d27e844 100644
--- a/src/modules/fancyzones/FancyZonesLib/JsonHelpers.h
+++ b/src/modules/fancyzones/FancyZonesLib/JsonHelpers.h
@@ -13,9 +13,9 @@ namespace BackwardsCompatibility
     struct DeviceIdData
     {
         std::wstring deviceName = L"FallbackDevice";
-        int width;
-        int height;
-        GUID virtualDesktopId;
+        int width{};
+        int height{};
+        GUID virtualDesktopId{};
         std::wstring monitorId;
 
         static std::optional<DeviceIdData> ParseDeviceId(const std::wstring& str);
@@ -77,7 +77,7 @@ namespace JSONHelpers
     struct LayoutQuickKeyJSON
     {
         std::wstring layoutUuid;
-        int key;
+        int key{};
 
         static std::optional<LayoutQuickKeyJSON> FromJson(const json::JsonObject& device);
     };
diff --git a/src/modules/powerrename/PowerRenameUILib/ExplorerItem.h b/src/modules/powerrename/PowerRenameUILib/ExplorerItem.h
index d955c161b8..293d059d7b 100644
--- a/src/modules/powerrename/PowerRenameUILib/ExplorerItem.h
+++ b/src/modules/powerrename/PowerRenameUILib/ExplorerItem.h
@@ -40,17 +40,16 @@ namespace winrt::PowerRenameUI::implementation
     private:
         std::wstring StateToErrorMessage();
 
-        int32_t m_id;
+        int32_t m_id{};
         hstring m_idStr;
         winrt::hstring m_original;
         winrt::hstring m_renamed;
-        uint32_t m_depth;
+        uint32_t m_depth{};
         hstring m_imagePath;
-        int32_t m_type;
-        bool m_checked;
-        PowerRenameItemRenameStatus m_state;
+        int32_t m_type{};
+        bool m_checked{};
+        PowerRenameItemRenameStatus m_state{};
         winrt::event<Microsoft::UI::Xaml::Data::PropertyChangedEventHandler> m_propertyChanged;
-
     };
 }
 
diff --git a/src/modules/videoconference/VideoConferenceModule/Toolbar.h b/src/modules/videoconference/VideoConferenceModule/Toolbar.h
index c4223f3d6a..b0a9484c57 100644
--- a/src/modules/videoconference/VideoConferenceModule/Toolbar.h
+++ b/src/modules/videoconference/VideoConferenceModule/Toolbar.h
@@ -56,9 +56,9 @@ private:
 
     bool HideToolbarWhenUnmuted = true;
 
-    uint64_t lastTimeCamOrMicMuteStateChanged;
+    uint64_t lastTimeCamOrMicMuteStateChanged{};
 
     std::atomic_bool moduleSettingsUpdateScheduled = false;
     std::atomic_bool generalSettingsUpdateScheduled = false;
-    UINT_PTR nTimerId;
+    UINT_PTR nTimerId{};
 };