diff --git a/reactos/base/applications/clipbrd/winutils.c b/reactos/base/applications/clipbrd/winutils.c
index 71b0e40b3e9..43697d53e94 100644
--- a/reactos/base/applications/clipbrd/winutils.c
+++ b/reactos/base/applications/clipbrd/winutils.c
@@ -14,9 +14,21 @@ void ShowLastWin32Error(HWND hwndParent)
     LPWSTR lpMsgBuf = NULL;
 
     dwError = GetLastError();
+    if (dwError == ERROR_SUCCESS)
+        return;
+
+    if (!FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+                        FORMAT_MESSAGE_FROM_SYSTEM |
+                        FORMAT_MESSAGE_IGNORE_INSERTS,
+                        NULL,
+                        dwError,
+                        LANG_USER_DEFAULT,
+                        (LPWSTR)&lpMsgBuf,
+                        0, NULL))
+    {
+        return;
+    }
 
-    FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
-                   NULL, dwError, 0, (LPWSTR)&lpMsgBuf, 0, NULL);
     MessageBoxW(hwndParent, lpMsgBuf, NULL, MB_OK | MB_ICONERROR);
     LocalFree(lpMsgBuf);
 }
diff --git a/reactos/base/applications/mplay32/mplay32.c b/reactos/base/applications/mplay32/mplay32.c
index 7845c427fc8..1a2e347de3e 100644
--- a/reactos/base/applications/mplay32/mplay32.c
+++ b/reactos/base/applications/mplay32/mplay32.c
@@ -209,16 +209,23 @@ ShowLastWin32Error(HWND hwnd)
     LPTSTR lpMessageBuffer;
     DWORD dwError = GetLastError();
 
-    if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
-                      NULL,
-                      dwError,
-                      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-                      (LPTSTR)&lpMessageBuffer,
-                      0, NULL) != 0)
+    if (dwError == ERROR_SUCCESS)
+        return;
+
+    if (!FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+                       FORMAT_MESSAGE_FROM_SYSTEM |
+                       FORMAT_MESSAGE_IGNORE_INSERTS,
+                       NULL,
+                       dwError,
+                       LANG_USER_DEFAULT,
+                       (LPTSTR)&lpMessageBuffer,
+                       0, NULL))
     {
-        MessageBox(hwnd, lpMessageBuffer, szAppTitle, MB_OK | MB_ICONERROR);
-        if (lpMessageBuffer) LocalFree(lpMessageBuffer);
+        return;
     }
+
+    MessageBox(hwnd, lpMessageBuffer, szAppTitle, MB_OK | MB_ICONERROR);
+    LocalFree(lpMessageBuffer);
 }
 
 static VOID
diff --git a/reactos/base/applications/mscutils/eventvwr/eventvwr.c b/reactos/base/applications/mscutils/eventvwr/eventvwr.c
index 96c8fd06156..74d43e6042c 100644
--- a/reactos/base/applications/mscutils/eventvwr/eventvwr.c
+++ b/reactos/base/applications/mscutils/eventvwr/eventvwr.c
@@ -245,13 +245,20 @@ ShowLastWin32Error(VOID)
     LPWSTR lpMessageBuffer;
 
     dwError = GetLastError();
-    FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
-                   NULL,
-                   dwError,
-                   0,
-                   (LPWSTR)&lpMessageBuffer,
-                   0,
-                   NULL);
+    if (dwError == ERROR_SUCCESS)
+        return;
+
+    if (!FormatMessageW(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+                        FORMAT_MESSAGE_FROM_SYSTEM |
+                        FORMAT_MESSAGE_IGNORE_INSERTS,
+                        NULL,
+                        dwError,
+                        LANG_USER_DEFAULT,
+                        (LPWSTR)&lpMessageBuffer,
+                        0, NULL))
+    {
+        return;
+    }
 
     MessageBoxW(hwndMainWindow, lpMessageBuffer, szTitle, MB_OK | MB_ICONERROR);
     LocalFree(lpMessageBuffer);
diff --git a/reactos/base/setup/welcome/welcome.c b/reactos/base/setup/welcome/welcome.c
index f0a2732d871..bae244ac5e1 100644
--- a/reactos/base/setup/welcome/welcome.c
+++ b/reactos/base/setup/welcome/welcome.c
@@ -113,20 +113,23 @@ ShowLastWin32Error(HWND hWnd)
     LPTSTR lpMessageBuffer = NULL;
     DWORD dwError = GetLastError();
 
-    if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
-                      NULL,
-                      dwError,
-                      MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-                      (LPTSTR)&lpMessageBuffer,
-                      0, NULL))
+    if (dwError == ERROR_SUCCESS)
+        return;
+
+    if (!FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+                       FORMAT_MESSAGE_FROM_SYSTEM |
+                       FORMAT_MESSAGE_IGNORE_INSERTS,
+                       NULL,
+                       dwError,
+                       LANG_USER_DEFAULT,
+                       (LPTSTR)&lpMessageBuffer,
+                       0, NULL))
     {
-        MessageBox(hWnd, lpMessageBuffer, szAppTitle, MB_OK | MB_ICONERROR);
+        return;
     }
 
-    if (lpMessageBuffer)
-    {
-        LocalFree(lpMessageBuffer);
-    }
+    MessageBox(hWnd, lpMessageBuffer, szAppTitle, MB_OK | MB_ICONERROR);
+    LocalFree(lpMessageBuffer);
 }
 #endif
 
diff --git a/reactos/dll/cpl/sysdm/general.c b/reactos/dll/cpl/sysdm/general.c
index 33e209acbd9..9516c33756e 100644
--- a/reactos/dll/cpl/sysdm/general.c
+++ b/reactos/dll/cpl/sysdm/general.c
@@ -35,23 +35,23 @@ VOID ShowLastWin32Error(HWND hWndOwner)
     DWORD LastError;
 
     LastError = GetLastError();
+    if (LastError == ERROR_SUCCESS)
+        return;
 
-    if ((LastError == 0) ||
-         !FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
-                        FORMAT_MESSAGE_FROM_SYSTEM,
-                        NULL,
-                        LastError,
-                        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-                        (LPTSTR)&lpMsg,
-                        0,
-                        NULL))
+    if (!FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER |
+                       FORMAT_MESSAGE_FROM_SYSTEM |
+                       FORMAT_MESSAGE_IGNORE_INSERTS,
+                       NULL,
+                       LastError,
+                       LANG_USER_DEFAULT,
+                       (LPTSTR)&lpMsg,
+                       0, NULL))
     {
         return;
     }
 
     MessageBox(hWndOwner, lpMsg, NULL, MB_OK | MB_ICONERROR);
-
-    LocalFree((LPVOID)lpMsg);
+    LocalFree(lpMsg);
 }