diff --git a/client/ScreenManager.cpp b/client/ScreenManager.cpp
index f7fb308..e6ff6d8 100644
--- a/client/ScreenManager.cpp
+++ b/client/ScreenManager.cpp
@@ -38,7 +38,7 @@ int UninitFileUpload()
 {
     return 0;
 }
-std::vector<std::string> GetClipboardFiles()
+std::vector<std::string> GetClipboardFiles(int &result)
 {
     return{};
 }
@@ -446,7 +446,8 @@ VOID CScreenManager::OnReceive(PBYTE szBuffer, ULONG ulLength)
         break;
     }
     case COMMAND_SCREEN_GET_CLIPBOARD: {
-        auto files = GetClipboardFiles();
+        int result = 0;
+        auto files = GetClipboardFiles(result);
         if (!files.empty()) {
             char h[100] = {};
             memcpy(h, szBuffer + 1, ulLength - 1);
@@ -481,7 +482,8 @@ VOID CScreenManager::OnReceive(PBYTE szBuffer, ULONG ulLength)
     }
     case COMMAND_GET_FILE: {
         // 发送文件
-        auto files = GetClipboardFiles();
+        int result = 0;
+        auto files = GetClipboardFiles(result);
         std::string dir = (char*)(szBuffer + 1);
         if (!files.empty() && !dir.empty()) {
             IOCPClient* pClient = new IOCPClient(g_bExit, true, MaskTypeNone, m_conn->GetHeaderEncType());
diff --git a/common/file_upload.h b/common/file_upload.h
index 759fdf6..f003d5c 100644
--- a/common/file_upload.h
+++ b/common/file_upload.h
@@ -19,7 +19,7 @@ int InitFileUpload(const std::string hmac, int chunkSizeKb = 64, int sendDuratio
 
 int UninitFileUpload();
 
-std::vector<std::string> GetClipboardFiles();
+std::vector<std::string> GetClipboardFiles(int& result);
 
 bool GetCurrentFolderPath(std::string& outDir);
 
diff --git a/lib/FileUpload_Libx64.lib b/lib/FileUpload_Libx64.lib
index 8849da3..bbf0bf2 100644
Binary files a/lib/FileUpload_Libx64.lib and b/lib/FileUpload_Libx64.lib differ
diff --git a/lib/FileUpload_Libx64d.lib b/lib/FileUpload_Libx64d.lib
index a9a25e2..1370fec 100644
Binary files a/lib/FileUpload_Libx64d.lib and b/lib/FileUpload_Libx64d.lib differ
diff --git a/server/2015Remote/2015Remote.cpp b/server/2015Remote/2015Remote.cpp
index 4fe6f49..70a9463 100644
--- a/server/2015Remote/2015Remote.cpp
+++ b/server/2015Remote/2015Remote.cpp
@@ -166,19 +166,22 @@ static BOOL HandleServiceCommandLine()
 
     // -service: 作为服务运行
     if (cmdLine.Find(_T("-service")) != -1) {
-        ServerService_Run();
+        int r = ServerService_Run();
+        Mprintf("[HandleServiceCommandLine] ServerService_Run %s", r ? "failed" : "succeed");
         return TRUE;
     }
 
     // -install: 安装服务
     if (cmdLine.Find(_T("-install")) != -1) {
-        ServerService_Install();
+        BOOL r = ServerService_Install();
+        Mprintf("[HandleServiceCommandLine] ServerService_Install %s", !r ? "failed" : "succeed");
         return TRUE;
     }
 
     // -uninstall: 卸载服务
     if (cmdLine.Find(_T("-uninstall")) != -1) {
-        ServerService_Uninstall();
+        BOOL r = ServerService_Uninstall();
+        Mprintf("[HandleServiceCommandLine] ServerService_Uninstall %s", !r ? "failed" : "succeed");
         return TRUE;
     }
 
@@ -186,6 +189,7 @@ static BOOL HandleServiceCommandLine()
     // 此模式下正常运行GUI，但使用不同的互斥量名称避免冲突
     if (cmdLine.Find(_T("-agent")) != -1) {
         // 继续正常启动GUI，但标记为代理模式
+        Mprintf("[HandleServiceCommandLine] Run service agent: '%s'", cmdLine.GetString());
         return FALSE;
     }
 
@@ -193,7 +197,9 @@ static BOOL HandleServiceCommandLine()
     BOOL registered = FALSE;
     BOOL running = FALSE;
     char servicePath[MAX_PATH] = { 0 };
-    ServerService_CheckStatus(&registered, &running, servicePath, MAX_PATH);
+    BOOL r = ServerService_CheckStatus(&registered, &running, servicePath, MAX_PATH);
+    Mprintf("[HandleServiceCommandLine] ServerService_CheckStatus %s", !r ? "failed" : "succeed");
+
     char curPath[MAX_PATH];
     GetModuleFileNameA(NULL, curPath, MAX_PATH);
 
@@ -202,22 +208,22 @@ static BOOL HandleServiceCommandLine()
     ExtractExePathFromServicePath(servicePath, serviceExePath, MAX_PATH);
 
     if (registered && _stricmp(curPath, serviceExePath) != 0) {
-        Mprintf("ServerService Uninstall: %s\n", servicePath);
+        Mprintf("[HandleServiceCommandLine] ServerService Uninstall: %s\n", servicePath);
         ServerService_Uninstall();
         registered = FALSE;
     }
     if (!registered) {
-        Mprintf("ServerService Install: %s\n", curPath);
+        Mprintf("[HandleServiceCommandLine] ServerService Install: %s\n", curPath);
         return ServerService_Install();
     } else if (!running) {
         int r = ServerService_Run();
-        Mprintf("ServerService Run '%s' %s\n", curPath, r == ERROR_SUCCESS ? "succeed" : "failed");
+        Mprintf("[HandleServiceCommandLine] ServerService Run '%s' %s\n", curPath, r == ERROR_SUCCESS ? "succeed" : "failed");
         if (r) {
             r = ServerService_StartSimple();
-            Mprintf("ServerService Start '%s' %s\n", curPath, r == ERROR_SUCCESS ? "succeed" : "failed");
+            Mprintf("[HandleServiceCommandLine] ServerService Start '%s' %s\n", curPath, r == ERROR_SUCCESS ? "succeed" : "failed");
             return r == ERROR_SUCCESS;
         }
-        return FALSE;
+        return TRUE;
     }
     return TRUE;
 }
@@ -268,11 +274,14 @@ BOOL CMy2015RemoteApp::InitInstance()
 {
 	char curFile[MAX_PATH] = { 0 };
 	GetModuleFileNameA(NULL, curFile, MAX_PATH);
-	if (!IsRunningAsAdmin() && LaunchAsAdmin(curFile, "runas"))
+    if (!IsRunningAsAdmin() && LaunchAsAdmin(curFile, "runas")) {
+        Mprintf("[InitInstance] 程序没有管理员权限，用户选择以管理员身份重新运行。");
         return FALSE;
+    }
 
     // 首先处理服务命令行参数
     if (HandleServiceCommandLine()) {
+        Mprintf("[InitInstance] 服务命令已处理，退出。");
         return FALSE;  // 服务命令已处理，退出
     }
 
@@ -286,11 +295,13 @@ BOOL CMy2015RemoteApp::InitInstance()
             m_Mutex = NULL;
             MessageBox("一个主控程序已经在运行，请检查任务管理器。",
                        "提示", MB_ICONINFORMATION);
+            Mprintf("[InitInstance] 一个主控程序已经在运行，退出。");
             return FALSE;
         }
     }
 #endif
 
+    Mprintf("[InitInstance] 主控程序启动运行。");
     SetUnhandledExceptionFilter(&whenbuged);
 
     // 创建并显示启动画面
@@ -371,7 +382,10 @@ int CMy2015RemoteApp::ExitInstance()
     // 只有在代理模式退出时才停止服务
     if (IsAgentMode()) {
         ServerService_Stop();
+        Mprintf("[InitInstance] 主控程序为代理模式，停止服务。");
     }
 
+    Mprintf("[InitInstance] 主控程序退出运行。");
+
     return CWinApp::ExitInstance();
 }
diff --git a/server/2015Remote/2015RemoteDlg.cpp b/server/2015Remote/2015RemoteDlg.cpp
index 20b1a42..4f0f1a0 100644
--- a/server/2015Remote/2015RemoteDlg.cpp
+++ b/server/2015Remote/2015RemoteDlg.cpp
@@ -2215,13 +2215,17 @@ VOID CMy2015RemoteDlg::MessageHandle(CONTEXT_OBJECT* ContextObject)
     switch (cmd) {
     case COMMAND_GET_FILE: {
         // 发送文件
-        auto files = GetClipboardFiles();
+        int result;
+        auto files = GetClipboardFiles(result);
         if (!files.empty()) {
             std::string dir = (char*)(szBuffer + 1);
             std::string hash = GetPwdHash(), hmac = GetHMAC(100);
             std::thread(FileBatchTransferWorker, files, dir, ContextObject, SendData, FinishSend,
                         hash, hmac).detach();
         }
+        else {
+			Mprintf("GetClipboardFiles failed: %d\n", result);
+        }
         break;
     }
     case COMMAND_SEND_FILE: {
@@ -3857,6 +3861,9 @@ void CMy2015RemoteDlg::RemoveRemoteWindow(HWND wnd)
 
 LRESULT CALLBACK CMy2015RemoteDlg::LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam)
 {
+    if (g_2015RemoteDlg == NULL)
+        return S_OK;
+
     if (nCode == HC_ACTION) {
         do {
             static CDialogBase* operateWnd = nullptr;
@@ -3883,7 +3890,8 @@ LRESULT CALLBACK CMy2015RemoteDlg::LowLevelKeyboardProc(int nCode, WPARAM wParam
                             break;
                         }
                         // [1] 本地 -> 远程
-                        auto files = GetClipboardFiles();
+                        int result;
+                        auto files = GetClipboardFiles(result);
                         if (!files.empty()) {
                             // 获取远程目录
                             BYTE szBuffer[100] = { COMMAND_GET_FOLDER };
@@ -3891,6 +3899,7 @@ LRESULT CALLBACK CMy2015RemoteDlg::LowLevelKeyboardProc(int nCode, WPARAM wParam
                             memcpy((char*)szBuffer + 1, masterId.c_str(), masterId.length());
                             memcpy((char*)szBuffer + 1 + masterId.length(), hmac.c_str(), hmac.length());
                             dlg->m_ContextObject->Send2Client(szBuffer, sizeof(szBuffer));
+                            Mprintf("【Ctrl+V】 从本地拷贝文件到远程 \n");
                         } else {
                             CString strText = GetClipboardText();
                             if (!strText.IsEmpty()) {
@@ -3898,9 +3907,12 @@ LRESULT CALLBACK CMy2015RemoteDlg::LowLevelKeyboardProc(int nCode, WPARAM wParam
                                 szBuffer[0] = COMMAND_SCREEN_SET_CLIPBOARD;
                                 memcpy(szBuffer + 1, strText.GetString(), strText.GetLength());
                                 dlg->m_ContextObject->Send2Client(szBuffer, strText.GetLength() + 1);
-                                Mprintf("【Ctrl+V】 从本地拷贝到远程 \n");
+                                Mprintf("【Ctrl+V】 从本地拷贝文本到远程 \n");
                                 SAFE_DELETE_ARRAY(szBuffer);
                             }
+                            else {
+								Mprintf("【Ctrl+V】 本地剪贴板没有文本或文件: %d \n", result);
+                            }
                         }
                     } else if (g_2015RemoteDlg->m_pActiveSession && operateWnd) {
                         auto screen = (CScreenSpyDlg*)(g_2015RemoteDlg->m_pActiveSession);
@@ -3913,12 +3925,9 @@ LRESULT CALLBACK CMy2015RemoteDlg::LowLevelKeyboardProc(int nCode, WPARAM wParam
                         std::string masterId = GetPwdHash(), hmac = GetHMAC(100);
                         memcpy((char*)bToken + 1, masterId.c_str(), masterId.length());
                         memcpy((char*)bToken + 1 + masterId.length(), hmac.c_str(), hmac.length());
-                        auto files = GetClipboardFiles();
-                        if (!files.empty()) {
-                            if (::OpenClipboard(nullptr)) {
-                                EmptyClipboard();
-                                CloseClipboard();
-                            }
+                        if (::OpenClipboard(nullptr)) {
+                            EmptyClipboard();
+                            CloseClipboard();
                         }
                         g_2015RemoteDlg->m_pActiveSession->m_ContextObject->Send2Client(bToken, sizeof(bToken));
                         Mprintf("【Ctrl+V】 从远程拷贝到本地 \n");
diff --git a/server/2015Remote/ScreenSpyDlg.cpp b/server/2015Remote/ScreenSpyDlg.cpp
index c0b1652..66569b8 100644
--- a/server/2015Remote/ScreenSpyDlg.cpp
+++ b/server/2015Remote/ScreenSpyDlg.cpp
@@ -52,7 +52,7 @@ int UninitFileUpload()
 {
     return 0;
 }
-std::vector<std::string> GetClipboardFiles()
+std::vector<std::string> GetClipboardFiles(int &result)
 {
     return{};
 }
diff --git a/server/2015Remote/ServerServiceWrapper.cpp b/server/2015Remote/ServerServiceWrapper.cpp
index 1a817d9..e95b8d4 100644
--- a/server/2015Remote/ServerServiceWrapper.cpp
+++ b/server/2015Remote/ServerServiceWrapper.cpp
@@ -451,7 +451,7 @@ BOOL ServerService_Install(void)
     return err == 0;
 }
 
-void ServerService_Uninstall(void)
+BOOL ServerService_Uninstall(void)
 {
     SC_HANDLE schSCManager = OpenSCManager(
                                  NULL,
@@ -461,7 +461,7 @@ void ServerService_Uninstall(void)
 
     if (schSCManager == NULL) {
         Mprintf("ERROR: OpenSCManager failed (%d)\n", (int)GetLastError());
-        return;
+        return FALSE;
     }
 
     SC_HANDLE schService = OpenServiceA(
@@ -473,7 +473,7 @@ void ServerService_Uninstall(void)
     if (schService == NULL) {
         Mprintf("ERROR: OpenService failed (%d)\n", (int)GetLastError());
         CloseServiceHandle(schSCManager);
-        return;
+        return FALSE;
     }
 
     // 停止服务
@@ -501,14 +501,17 @@ void ServerService_Uninstall(void)
         }
     }
 
+	BOOL r = FALSE;
     // 删除服务
     Mprintf("Deleting service...\n");
     if (DeleteService(schService)) {
         Mprintf("SUCCESS: Service uninstalled successfully\n");
+        r = TRUE;
     } else {
         Mprintf("ERROR: DeleteService failed (%d)\n", (int)GetLastError());
     }
 
     CloseServiceHandle(schService);
     CloseServiceHandle(schSCManager);
+    return r;
 }
diff --git a/server/2015Remote/ServerServiceWrapper.h b/server/2015Remote/ServerServiceWrapper.h
index 64823e6..9337fb0 100644
--- a/server/2015Remote/ServerServiceWrapper.h
+++ b/server/2015Remote/ServerServiceWrapper.h
@@ -52,7 +52,7 @@ int ServerService_Stop(void);
 BOOL ServerService_Install(void);
 
 // 卸载服务
-void ServerService_Uninstall(void);
+BOOL ServerService_Uninstall(void);
 
 // 服务工作线程
 DWORD WINAPI ServerService_WorkerThread(LPVOID lpParam);