diff --git a/.gitignore b/.gitignore
index 587b7e9..e0a619e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -70,8 +70,8 @@ Thumbs.db
 *.exe
 
 # Custom
-/nekoray/
-/build/
+/nekoray
+/build
 CMakeLists.txt.user*
 /cmake-build-*
 /build-*
@@ -81,4 +81,4 @@ CMakeLists.txt.user*
 # Deploy
 /deployment
 /neko*.sh
-/qtsdk/
+/qtsdk
diff --git a/3rdparty/QThreadCreateThread.hpp b/3rdparty/QThreadCreateThread.hpp
index 2822ba8..ba6fe5f 100644
--- a/3rdparty/QThreadCreateThread.hpp
+++ b/3rdparty/QThreadCreateThread.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <future>
 #include <QThread>
 
 // FOR OLD QT
diff --git a/3rdparty/RunGuard.hpp b/3rdparty/RunGuard.hpp
index 3702610..f24c798 100644
--- a/3rdparty/RunGuard.hpp
+++ b/3rdparty/RunGuard.hpp
@@ -7,15 +7,14 @@
 #include <QCryptographicHash>
 
 class RunGuard {
-
 public:
     RunGuard(const QString &key);
 
     ~RunGuard();
 
-    bool isAnotherRunning();
+    bool isAnotherRunning(quint64 *data_out);
 
-    bool tryToRun();
+    bool tryToRun(quint64 *data_in);
 
     void release();
 
@@ -42,15 +41,13 @@ namespace {
         return data;
     }
 
-}
-
+} // namespace
 
 RunGuard::RunGuard(const QString &key)
-        : key(key), memLockKey(generateKeyHash(key, "_memLockKey")),
-          sharedmemKey(generateKeyHash(key, "_sharedmemKey")), sharedMem(sharedmemKey), memLock(memLockKey, 1) {
+    : key(key), memLockKey(generateKeyHash(key, "_memLockKey")), sharedmemKey(generateKeyHash(key, "_sharedmemKey")), sharedMem(sharedmemKey), memLock(memLockKey, 1) {
     memLock.acquire();
     {
-        QSharedMemory fix(sharedmemKey);    // Fix for *nix: http://habrahabr.ru/post/173281/
+        QSharedMemory fix(sharedmemKey); // Fix for *nix: http://habrahabr.ru/post/173281/
         fix.attach();
     }
     memLock.release();
@@ -60,26 +57,32 @@ RunGuard::~RunGuard() {
     release();
 }
 
-bool RunGuard::isAnotherRunning() {
+bool RunGuard::isAnotherRunning(quint64 *data_out) {
     if (sharedMem.isAttached())
         return false;
 
     memLock.acquire();
     const bool isRunning = sharedMem.attach();
-    if (isRunning)
+    if (isRunning) {
+        if (data_out != nullptr) {
+            memcpy(data_out, sharedMem.data(), sizeof(quint64));
+        }
         sharedMem.detach();
+    }
     memLock.release();
 
     return isRunning;
 }
 
-bool RunGuard::tryToRun() {
-    if (isAnotherRunning())   // Extra check
+bool RunGuard::tryToRun(quint64 *data_in) {
+    if (isAnotherRunning(nullptr)) // Extra check
         return false;
 
     memLock.acquire();
     const bool result = sharedMem.create(sizeof(quint64));
+    if (result) memcpy(sharedMem.data(), data_in, sizeof(quint64));
     memLock.release();
+
     if (!result) {
         release();
         return false;
diff --git a/cmake/fuck_windows/fuck.cmake b/cmake/fuck_windows/fuck.cmake
index ed82fcd..c91e82a 100644
--- a/cmake/fuck_windows/fuck.cmake
+++ b/cmake/fuck_windows/fuck.cmake
@@ -1,5 +1,5 @@
 if (WIN32)
-    set(PLATFORM_FUCKING_SOURCES 3rdparty/WinCommander.cpp)
+    set(PLATFORM_FUCKING_SOURCES 3rdparty/WinCommander.cpp sys/windows/guihelper.cpp)
     set(PLATFORM_FUCKING_LIBRARIES wininet wsock32 ws2_32 user32 rasapi32 iphlpapi)
 
     include(cmake/fuck_windows/generate_product_version.cmake)
diff --git a/main/GuiUtils.hpp b/main/GuiUtils.hpp
index fdf13f6..6573226 100644
--- a/main/GuiUtils.hpp
+++ b/main/GuiUtils.hpp
@@ -1,5 +1,9 @@
 #pragma once
 
+#ifdef Q_OS_WIN
+#include "sys/windows/guihelper.h"
+#endif
+
 // Dialogs
 
 #define Dialog_DialogBasicSettings "DialogBasicSettings"
@@ -58,3 +62,21 @@
     CACHE.a = QJsonObject2QString(result, true);                      \
     if (result.isEmpty()) CACHE.a = "";                               \
     editor->deleteLater();
+
+// System
+
+#define _ACTIVE_THIS_WINDOW_COMMON                                             \
+    hide();                                                                    \
+    showMinimized();                                                           \
+    showNormal();                                                              \
+    activateWindow();                                                          \
+    setWindowState((windowState() & ~Qt::WindowMinimized) | Qt::WindowActive); \
+    raise();
+
+#ifdef Q_OS_WIN
+#define ACTIVE_THIS_WINDOW     \
+    _ACTIVE_THIS_WINDOW_COMMON \
+    Windows_QWidget_SetForegroundWindow(this);
+#else
+#define ACTIVE_THIS_WINDOW _ACTIVE_THIS_WINDOW_COMMON
+#endif
diff --git a/main/NekoRay_Utils.cpp b/main/NekoRay_Utils.cpp
index 08e457d..4fcb08e 100644
--- a/main/NekoRay_Utils.cpp
+++ b/main/NekoRay_Utils.cpp
@@ -69,6 +69,13 @@ QString GetRandomString(int randomStringLength) {
     return randomString;
 }
 
+quint64 GetRandomUint64() {
+    std::random_device rd;
+    std::mt19937 mt(rd());
+    std::uniform_int_distribution<quint64> dist;
+    return dist(mt);
+}
+
 // QString >> QJson
 QJsonObject QString2QJsonObject(const QString &jsonString) {
     QJsonDocument jsonDocument = QJsonDocument::fromJson(jsonString.toUtf8());
diff --git a/main/NekoRay_Utils.hpp b/main/NekoRay_Utils.hpp
index 7fe01e1..1e76744 100644
--- a/main/NekoRay_Utils.hpp
+++ b/main/NekoRay_Utils.hpp
@@ -55,6 +55,8 @@ QString GetQueryValue(const QUrlQuery &q, const QString &key, const QString &def
 
 QString GetRandomString(int randomStringLength);
 
+quint64 GetRandomUint64();
+
 inline QString UrlSafe_encode(const QString &s) {
     return s.toUtf8().toPercentEncoding().replace(" ", "%20");
 }
diff --git a/main/main.cpp b/main/main.cpp
index 97d6e99..6b4239f 100644
--- a/main/main.cpp
+++ b/main/main.cpp
@@ -7,6 +7,8 @@
 #include <QTranslator>
 #include <QMessageBox>
 #include <QStandardPaths>
+#include <QLocalSocket>
+#include <QLocalServer>
 
 #include "3rdparty/RunGuard.hpp"
 #include "main/NekoRay.hpp"
@@ -22,6 +24,8 @@ void signal_handler(int signum) {
     }
 }
 
+#define LOCAL_SERVER_PREFIX "nekoraylocalserver-"
+
 int main(int argc, char *argv[]) {
     // Core dump
 #ifdef Q_OS_WIN
@@ -72,11 +76,25 @@ int main(int argc, char *argv[]) {
 
     // RunGuard
     RunGuard guard("nekoray" + wd.absolutePath());
-    if (!NekoRay::dataStore->flag_many) {
-        if (!guard.tryToRun()) {
-            QMessageBox::warning(nullptr, "NekoRay", QObject::tr("Another program is running."));
+    quint64 guard_data_in = GetRandomUint64();
+    quint64 guard_data_out = 0;
+    if (!NekoRay::dataStore->flag_many && !guard.tryToRun(&guard_data_in)) {
+        // Some Good System
+        if (guard.isAnotherRunning(&guard_data_out)) {
+            // Wake up a running instance
+            QLocalSocket socket;
+            socket.connectToServer(LOCAL_SERVER_PREFIX + Int2String(guard_data_out));
+            qDebug() << socket.fullServerName();
+            if (!socket.waitForConnected(500)) {
+                qDebug() << "Failed to wake a running instance.";
+                return 0;
+            }
+            qDebug() << "connected to local server, try to raise another program";
             return 0;
         }
+        // Some Bad System
+        QMessageBox::warning(nullptr, "NekoRay", "RunGuard disallow to run, use -many to force start.");
+        return 0;
     }
     MF_release_runguard = [&] { guard.release(); };
 
@@ -159,6 +177,19 @@ int main(int argc, char *argv[]) {
     signal(SIGTERM, signal_handler);
     signal(SIGINT, signal_handler);
 
+    // QLocalServer
+    QLocalServer server;
+    auto server_name = LOCAL_SERVER_PREFIX + Int2String(guard_data_in);
+    QLocalServer::removeServer(server_name);
+    server.listen(server_name);
+    QObject::connect(&server, &QLocalServer::newConnection, &a, [&] {
+        auto socket = server.nextPendingConnection();
+        qDebug() << "nextPendingConnection:" << server_name << socket;
+        socket->deleteLater();
+        // raise main window
+        MW_dialog_message("", "Raise");
+    });
+
     UI_InitMainWindow();
     return QApplication::exec();
 }
diff --git a/sys/windows/guihelper.cpp b/sys/windows/guihelper.cpp
new file mode 100644
index 0000000..a297415
--- /dev/null
+++ b/sys/windows/guihelper.cpp
@@ -0,0 +1,15 @@
+
+#include "guihelper.h"
+
+#include <QWidget>
+
+#include <windows.h>
+
+void Windows_QWidget_SetForegroundWindow(QWidget* w) {
+    HWND hForgroundWnd = GetForegroundWindow();
+    DWORD dwForeID = ::GetWindowThreadProcessId(hForgroundWnd, NULL);
+    DWORD dwCurID = ::GetCurrentThreadId();
+    ::AttachThreadInput(dwCurID, dwForeID, TRUE);
+    ::SetForegroundWindow((HWND) w->winId());
+    ::AttachThreadInput(dwCurID, dwForeID, FALSE);
+}
diff --git a/sys/windows/guihelper.h b/sys/windows/guihelper.h
new file mode 100644
index 0000000..d7afb91
--- /dev/null
+++ b/sys/windows/guihelper.h
@@ -0,0 +1,5 @@
+#pragma once
+
+class QWidget;
+
+void Windows_QWidget_SetForegroundWindow(QWidget* w);
diff --git a/test/test-qt512-sdk-build.sh b/test/test-qt512-sdk-build.sh
new file mode 100644
index 0000000..9414691
--- /dev/null
+++ b/test/test-qt512-sdk-build.sh
@@ -0,0 +1,7 @@
+QT=$PWD/qtsdk/5.12.12/gcc_64
+BUILD=build-sdk-qt512
+rm -rf $BUILD
+mkdir -p $BUILD
+cd $BUILD
+cmake -GNinja -DCMAKE_PREFIX_PATH=$QT ..
+ninja
diff --git a/translations/zh_CN.ts b/translations/zh_CN.ts
index cf464f6..6349926 100644
--- a/translations/zh_CN.ts
+++ b/translations/zh_CN.ts
@@ -1333,10 +1333,6 @@ As of January 1, 2022, compatibility with MD5 authentication information will be
         <source>This profile is cleartext, don&apos;t use it if the server is not in your local network.</source>
         <translation>该配置为明文传输，如果服务器不在本地局域网，请不要使用。</translation>
     </message>
-    <message>
-        <source>Another program is running.</source>
-        <translation>另一个 Nekoray 实例正在运行。</translation>
-    </message>
     <message>
         <source>Select</source>
         <translation>选择</translation>
diff --git a/ui/mainwindow.cpp b/ui/mainwindow.cpp
index 5c4617e..337e5ba 100644
--- a/ui/mainwindow.cpp
+++ b/ui/mainwindow.cpp
@@ -22,19 +22,13 @@
 #include "qv2ray/v2/ui/LogHighlighter.hpp"
 
 #ifndef NKR_NO_EXTERNAL
-
 #include "3rdparty/ZxingQtReader.hpp"
-
 #endif
 
 #ifdef Q_OS_WIN
-
 #include "3rdparty/WinCommander.hpp"
-
 #else
-
 #include <unistd.h>
-
 #endif
 
 #include <QClipboard>
@@ -238,9 +232,7 @@ MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWi
                 if (this->isVisible()) {
                     hide();
                 } else {
-                    this->showNormal();
-                    this->raise();
-                    this->activateWindow();
+                    ACTIVE_THIS_WINDOW
                 }
                 break;
             default:
@@ -445,6 +437,7 @@ void MainWindow::show_group(int gid) {
 // callback
 
 void MainWindow::dialog_message_impl(const QString &sender, const QString &info) {
+    // info
     if (info.contains("UpdateIcon")) {
         icon_status = -1;
         refresh_status();
@@ -464,8 +457,10 @@ void MainWindow::dialog_message_impl(const QString &sender, const QString &info)
     if (info == "RestartProgram") {
         this->exit_reason = 2;
         on_menu_exit_triggered();
+    } else if (info == "Raise") {
+        ACTIVE_THIS_WINDOW
     }
-    //
+    // sender
     if (sender == Dialog_DialogEditProfile) {
         if (info == "accept") {
             refresh_proxy_list();
diff --git a/ui/mainwindow_grpc.cpp b/ui/mainwindow_grpc.cpp
index 7140f0e..a6a8f7e 100644
--- a/ui/mainwindow_grpc.cpp
+++ b/ui/mainwindow_grpc.cpp
@@ -310,19 +310,20 @@ void MainWindow::CheckUpdate() {
     }
 
     runOnUiThread([=] {
+        auto allow_updater = !NekoRay::dataStore->flag_use_appdata;
         auto note_pre_release = response.is_pre_release() ? " (Pre-release)" : "";
         QMessageBox box(QMessageBox::Question, QObject::tr("Update") + note_pre_release,
                         QObject::tr("Update found: %1\nRelease note:\n%2").arg(response.assets_name().c_str(), response.release_note().c_str()));
         //
         QAbstractButton *btn1 = nullptr;
-        if (!NekoRay::dataStore->flag_use_appdata) {
+        if (allow_updater) {
             btn1 = box.addButton(QObject::tr("Update"), QMessageBox::AcceptRole);
         }
         QAbstractButton *btn2 = box.addButton(QObject::tr("Open in browser"), QMessageBox::AcceptRole);
         box.addButton(QObject::tr("Close"), QMessageBox::RejectRole);
         box.exec();
         //
-        if (btn1 == box.clickedButton()) {
+        if (btn1 == box.clickedButton() && allow_updater) {
             // Download Update
             runOnNewThread([=] {
                 bool ok2;