diff --git a/openless-all/app/windows-ime/OpenLessIme.vcxproj b/openless-all/app/windows-ime/OpenLessIme.vcxproj
index 2bbe9feb..956cd1fa 100644
--- a/openless-all/app/windows-ime/OpenLessIme.vcxproj
+++ b/openless-all/app/windows-ime/OpenLessIme.vcxproj
@@ -75,6 +75,12 @@
       <PreprocessorDefinitions>WIN32;_WINDOWS;_USRDLL;OPENLESSIME_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpp17</LanguageStandard>
+      <!-- 静态链接 CRT：让 OpenLessIme.dll 自带 MSVCP / VCRUNTIME / UCRT，
+           避免被宿主进程（如 QQ）app/ 目录下的私有 MSVCP140 副本劫持。
+           QQ 把 MSVCP140.dll 放在 versions/<ver>/resources/app/，DLL 搜索
+           顺序优先 → 我们的 std::* 调用会跑 QQ 那份旧版 → ABI 漂移 → 0xc0000005。
+           DLL 大小 +~300 KB；DLL 内部 STL 不再可跨边界共享（我们也不需要）。 -->
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -89,6 +95,7 @@
       <PreprocessorDefinitions>WIN32;_WINDOWS;_USRDLL;OPENLESSIME_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpp17</LanguageStandard>
+      <RuntimeLibrary>MultiThreadedDebug</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -105,6 +112,7 @@
       <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;OPENLESSIME_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpp17</LanguageStandard>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
@@ -123,6 +131,7 @@
       <PreprocessorDefinitions>WIN32;NDEBUG;_WINDOWS;_USRDLL;OPENLESSIME_EXPORTS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <ConformanceMode>true</ConformanceMode>
       <LanguageStandard>stdcpp17</LanguageStandard>
+      <RuntimeLibrary>MultiThreaded</RuntimeLibrary>
     </ClCompile>
     <Link>
       <SubSystem>Windows</SubSystem>
diff --git a/openless-all/app/windows-ime/src/dllmain.cpp b/openless-all/app/windows-ime/src/dllmain.cpp
index 84476ba2..624c79f7 100644
--- a/openless-all/app/windows-ime/src/dllmain.cpp
+++ b/openless-all/app/windows-ime/src/dllmain.cpp
@@ -13,9 +13,13 @@ LONG g_object_count = 0;
 BOOL APIENTRY DllMain(HINSTANCE instance, DWORD reason, LPVOID reserved) {
   UNREFERENCED_PARAMETER(reserved);
 
+  // 不调用 DisableThreadLibraryCalls：DLL 现在用 /MT 静态链接 CRT，CRT 需要
+  // DLL_THREAD_ATTACH / DLL_THREAD_DETACH 通知做 per-thread TLS 初始化与清理。
+  // 在 host 进程（如 QQ / Office）切输入法新建 input thread 时禁用通知，会让
+  // 静态 CRT 的 thread-local 资源泄漏 / 行为不稳定，反而把这次想修的崩溃问题
+  // 重新引回来。详见 Microsoft 文档 DisableThreadLibraryCalls 备注。
   if (reason == DLL_PROCESS_ATTACH) {
     g_module = instance;
-    DisableThreadLibraryCalls(instance);
   }
 
   return TRUE;