diff --git a/client/ScreenCapture.h b/client/ScreenCapture.h
index 2758351..2862e95 100644
--- a/client/ScreenCapture.h
+++ b/client/ScreenCapture.h
@@ -17,6 +17,15 @@
 #include "X264Encoder.h"
 #include "common/file_upload.h"
 
+inline bool HasSSE2() {
+#ifdef _DEBUG
+    return false;
+#else
+    auto static has = IsProcessorFeaturePresent(PF_XMMI64_INSTRUCTIONS_AVAILABLE);
+    return has;
+#endif
+}
+
 class ThreadPool
 {
 public:
@@ -304,7 +313,7 @@ public:
     virtual ULONG CompareBitmap(LPBYTE CompareSourData, LPBYTE CompareDestData, LPBYTE szBuffer,
                                 DWORD ulCompareLength, BYTE algo, int startPostion = 0)
     {
-        if (UsingDXGI())
+        if (UsingDXGI() || !HasSSE2())
             return CompareBitmapDXGI(CompareSourData, CompareDestData, szBuffer, ulCompareLength, algo, startPostion);
 
         LPBYTE p = szBuffer;
diff --git a/client/ScreenCapturerDXGI.h b/client/ScreenCapturerDXGI.h
index e7784e2..b9d1327 100644
--- a/client/ScreenCapturerDXGI.h
+++ b/client/ScreenCapturerDXGI.h
@@ -110,7 +110,7 @@ public:
             // 9. 初始化 BITMAPINFO
             m_BitmapInfor_Full = ConstructBitmapInfo(32, m_ulFullWidth, m_ulFullHeight);
             iniFile cfg(CLIENT_PATH);
-            int strategy = cfg.GetInt("settings", "ScreenStrategy", 0);
+            int strategy = HasSSE2() ? cfg.GetInt("settings", "ScreenStrategy", 0) : 1;
             switch (strategy) {
             case 1:
                 break;
diff --git a/client/ScreenManager.cpp b/client/ScreenManager.cpp
index a8d2237..a62e064 100644
--- a/client/ScreenManager.cpp
+++ b/client/ScreenManager.cpp
@@ -332,6 +332,11 @@ BOOL IsRunningAsSystem()
 
 BOOL CScreenManager::OnReconnect()
 {
+	auto duration = GetTickCount64() - m_nReconnectTime;
+    if (duration <= 3000)
+        Sleep(3000 - duration);
+	m_nReconnectTime = GetTickCount64();
+
     m_SendFirst = FALSE;
     BOOL r = m_ClientObject ? m_ClientObject->Reconnect(this) : FALSE;
     Mprintf("CScreenManager OnReconnect '%s'\n", r ? "succeed" : "failed");
diff --git a/client/ScreenManager.h b/client/ScreenManager.h
index 4dd19b1..b9943da 100644
--- a/client/ScreenManager.h
+++ b/client/ScreenManager.h
@@ -75,6 +75,7 @@ public:
     bool SwitchScreen();
     bool RestartScreen();
     virtual BOOL OnReconnect();
+    uint64_t            m_nReconnectTime = 0; // 重连开始时间
     uint64_t            m_DlgID = 0;
     BOOL                m_SendFirst = FALSE;
 
diff --git a/client/ScreenSpy.cpp b/client/ScreenSpy.cpp
index a60b96c..bfdaa5d 100644
--- a/client/ScreenSpy.cpp
+++ b/client/ScreenSpy.cpp
@@ -20,7 +20,7 @@ CScreenSpy::CScreenSpy(ULONG ulbiBitCount, BYTE algo, BOOL vDesk, int gop, BOOL
     m_BitmapInfor_Full = ConstructBitmapInfo(ulbiBitCount, m_ulFullWidth, m_ulFullHeight);
 
     iniFile cfg(CLIENT_PATH);
-    int strategy = cfg.GetInt("settings", "ScreenStrategy", 0);
+    int strategy = HasSSE2() ? cfg.GetInt("settings", "ScreenStrategy", 0) : 1;
     m_BitmapInfor_Send = new BITMAPINFO(*m_BitmapInfor_Full);
     switch (strategy) {
     case 1: // 1 - Original size
diff --git a/server/2015Remote/2015RemoteDlg.cpp b/server/2015Remote/2015RemoteDlg.cpp
index a4f2e75..0450020 100644
--- a/server/2015Remote/2015RemoteDlg.cpp
+++ b/server/2015Remote/2015RemoteDlg.cpp
@@ -2350,7 +2350,8 @@ void delay_cancel(CONTEXT_OBJECT* ctx, int sec)
     CDlgFileSend* dlg = (CDlgFileSend*)ctx->hDlg;
     dlg->FinishFileSend(TRUE);
     Sleep(sec*1000);
-    dlg->PostMessageA(WM_CLOSE);
+    if (::IsWindow(dlg->GetSafeHwnd()))
+        dlg->PostMessageA(WM_CLOSE);
     ctx->hDlg = NULL;
     ctx->CancelIO();
 }
diff --git a/server/2015Remote/ScreenSpyDlg.cpp b/server/2015Remote/ScreenSpyDlg.cpp
index 90fdf1b..69bfb47 100644
--- a/server/2015Remote/ScreenSpyDlg.cpp
+++ b/server/2015Remote/ScreenSpyDlg.cpp
@@ -304,8 +304,8 @@ BOOL CScreenSpyDlg::OnInitDialog()
     // 设置合理的"正常"窗口大小（屏幕的 80%），否则还原时窗口极小
     int cxScreen = GetSystemMetrics(SM_CXSCREEN);
     int cyScreen = GetSystemMetrics(SM_CYSCREEN);
-    int normalWidth = cxScreen * 80 / 100;
-    int normalHeight = cyScreen * 80 / 100;
+    int normalWidth = cxScreen * 0.382;
+    int normalHeight = cyScreen * 0.382;
     int normalX = (cxScreen - normalWidth) / 2;
     int normalY = (cyScreen - normalHeight) / 2;
 
@@ -332,6 +332,7 @@ VOID CScreenSpyDlg::OnClose()
 {
 	KillTimer(1);
 	KillTimer(2);
+    KillTimer(3);
     if (!m_aviFile.IsEmpty()) {
         KillTimer(TIMER_ID);
         m_aviFile = "";
@@ -365,6 +366,7 @@ afx_msg LRESULT CScreenSpyDlg::OnDisconnect(WPARAM wParam, LPARAM lParam)
 	m_nDisconnectTime = GetTickCount64();
 	// Close the dialog if reconnect not succeed in 15 seconds
     SetTimer(2, 15000, NULL);
+    SetTimer(3, 3000, NULL);
     PostMessage(WM_PAINT);
     return S_OK;
 }
@@ -615,7 +617,7 @@ void CScreenSpyDlg::OnPaint()
             NULL,
             DI_NORMAL | DI_COMPAT
         );
-    if (!m_bConnected && GetTickCount64()-m_nDisconnectTime>2000) {
+    if (!m_bConnected && GetTickCount64() - m_nDisconnectTime>2000) {
         DrawTipString("正在重连......", 2);
 	}
 }
@@ -863,6 +865,10 @@ void CScreenSpyDlg::OnTimer(UINT_PTR nIDEvent)
         this->PostMessageA(WM_CLOSE, 0, 0);
         return;
 	}
+    if (nIDEvent == 3) {
+        KillTimer(3);
+        PostMessageA(WM_PAINT);
+    }
     CDialog::OnTimer(nIDEvent);
 }