[Settings]Don't launch if explorer is running elevated (#18124)

src/common/utils/elevation.h

@@ -83,7 +83,7 @@ namespace
     inline bool GetDesktopAutomationObject(REFIID riid, void** ppv)
     {
         CComPtr<IShellView> spsv;
-        
+
         // Desktop may not be available on startup
         auto attempts = 5;
         for (auto i = 1; i <= attempts; i++)
@@ -492,4 +492,31 @@ inline bool check_user_is_admin()
 
     freeMemory(pSID, pGroupInfo);
     return false;
-}
+}
+
+inline bool is_process_of_window_elevated(HWND window)
+{
+    DWORD pid = 0;
+    GetWindowThreadProcessId(window, &pid);
+    if (!pid)
+    {
+        return false;
+    }
+
+    wil::unique_handle hProcess{ OpenProcess(PROCESS_QUERY_LIMITED_INFORMATION,
+                                             FALSE,
+                                             pid) };
+
+    wil::unique_handle token;
+
+    if (OpenProcessToken(hProcess.get(), TOKEN_QUERY, &token))
+    {
+        TOKEN_ELEVATION elevation;
+        DWORD size;
+        if (GetTokenInformation(token.get(), TokenElevation, &elevation, sizeof(elevation), &size))
+        {
+            return elevation.TokenIsElevated != 0;
+        }
+    }
+    return false;
+}