diff --git a/device/win_usb/win_usb.cpp b/device/win_usb/win_usb.cpp
index 124f6ed..3eea0d2 100644
--- a/device/win_usb/win_usb.cpp
+++ b/device/win_usb/win_usb.cpp
@@ -880,7 +880,8 @@ usb_monitor::usb_monitor() : wnd_monitor_(NULL), handle_msg_id_(0), run_(true)
     {
         thread_handle_device_change_msg();
     };
-    handle_msg_.start(tf, "usb_monitor::thread_handle_device_change_msg");
+    void(usb_monitor:: * pnp)(void) = &usb_monitor::thread_handle_device_change_msg;
+    handle_msg_.start(tf, "usb_monitor::thread_handle_device_change_msg", *(void**)&pnp);
 #else
     handle_msg_.reset(new std::thread(&usb_monitor::thread_handle_device_change_msg, this));
 #endif
diff --git a/sln/usb_tools/DlgScanner.cpp b/sln/usb_tools/DlgScanner.cpp
index a44fa27..7ae0280 100644
--- a/sln/usb_tools/DlgScanner.cpp
+++ b/sln/usb_tools/DlgScanner.cpp
@@ -8,6 +8,7 @@
 
 #include <direct.h>
 #include <file/file_util.h>
+#include <coding/coding.h>
 #include <json/gb_json.h>
 #include <sane_opt_json/device_opt.h>
 #include <huagao/hgscanner_error.h>
@@ -956,11 +957,18 @@ int CDlgScanner::refresh_bulk_status(bool en_dev_log)
 
 	return err;
 }
+static DWORD cf_id = 0;
+static DWORD WINAPI clean_file(LPVOID lp)
+{
+	return 0;
+}
 void CDlgScanner::thread_auto_tx_file(void)
 {
 	char		loc[256] = { 0 },
 				remt[256] = { 0 };
-	uint32_t	ind = 0, err = 0;
+	char		chk0[40] = { 0 }, chk[40] = { 0 };
+	SYSTEMTIME	tm0 = { 0 }, tmn = { 0 };
+	uint32_t	ind = 0, err = 0, cleanid = 2;
 	std::string	file(""), prev(""), ext("");
 	std::wstring	oper(L"");
 	chronograph	watch;
@@ -982,6 +990,7 @@ void CDlgScanner::thread_auto_tx_file(void)
 	prev.insert(ind, "\\tx");
 
 	ind = 0;
+	coding_util::md5(usb::a2u(file.c_str()).c_str(), chk0);
 	while (auto_tx_)
 	{
 		double *prog = NULL, prevg = .0f;
@@ -1060,7 +1069,37 @@ void CDlgScanner::thread_auto_tx_file(void)
 			}
 			if (err)
 				break;
-			Sleep(1000);
+
+			bool go = true;
+			if (ind == 1)
+			{
+				usb::get_file_time(file.c_str(), NULL, &tm0, NULL);
+			}
+			else if(cleanid + 100 < ind)
+			{
+				// clean ...
+				utils::to_log(LOG_LEVEL_DEBUG, "xxx --- Delete receied files ...\r\n");
+				for (; cleanid < ind - 1; ++cleanid)
+				{
+					std::string f(prev + std::to_string(cleanid) + ext);
+
+					coding_util::md5(usb::a2u(f.c_str()).c_str(), chk);
+					if (stricmp(chk0, chk))
+					{
+						go = false;
+						MessageBoxA(m_hWnd, ("MD5 check failure at: " + std::to_string(cleanid)).c_str(), "Fatal", MB_OK);
+						break;
+					}
+					usb::get_file_time(f.c_str(), NULL, &tmn, NULL);
+					if (!(tmn.wHour == tm0.wHour && tmn.wMinute == tm0.wMinute))
+						file_util::force_delete_file(usb::a2u(f.c_str()).c_str());
+				}
+				utils::to_log(LOG_LEVEL_DEBUG, "xxx --- Delete receied files OVER.\r\n");
+			}
+			if (go)
+				Sleep(1000);
+			else
+				break;
 		}
 		if (auto_tx_ != (FILE_TX_RECEIVE | FILE_TX_SEND))
 			break;
diff --git a/sln/usb_tools/DlgScanner.h b/sln/usb_tools/DlgScanner.h
index c816afa..258175e 100644
--- a/sln/usb_tools/DlgScanner.h
+++ b/sln/usb_tools/DlgScanner.h
@@ -35,6 +35,7 @@ namespace usb
 	const wchar_t* error_name(int err, wchar_t* unk = NULL);
 	std::wstring a2u(const char* ansi);
 	std::string u2a(const wchar_t* unic);
+	bool get_file_time(const char* file, LPSYSTEMTIME pcreate, LPSYSTEMTIME pmodify, LPSYSTEMTIME paccess);
 	void enum_endpoints(libusb_device* device, std::vector<USBEP>& eps);
 	const wchar_t* ep_type(BYTE type);
 	BYTE ep_type(const wchar_t* str);
diff --git a/sln/usb_tools/usb_toolsDlg.cpp b/sln/usb_tools/usb_toolsDlg.cpp
index 57bed12..ad482cb 100644
--- a/sln/usb_tools/usb_toolsDlg.cpp
+++ b/sln/usb_tools/usb_toolsDlg.cpp
@@ -273,6 +273,53 @@ namespace usb
 		return std::move(a);
 	}
 
+	bool get_file_time(const char* file, LPSYSTEMTIME pcreate, LPSYSTEMTIME pmodify, LPSYSTEMTIME paccess)
+	{
+		bool	ret = false;
+		HANDLE	h = CreateFileA(file, GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+
+		while (h != INVALID_HANDLE_VALUE)
+		{
+			FILETIME	c = { 0 }, m = { 0 }, a = { 0 }, l = { 0 };
+			if (GetFileTime(h, &c, &a, &m))
+			{
+				if (pcreate)
+				{
+					if (FileTimeToLocalFileTime(&c, &l))
+					{
+						ret = FileTimeToSystemTime(&l, pcreate) == TRUE;
+						if (!ret)
+							break;
+					}
+				}
+				if (pmodify)
+				{
+					if (FileTimeToLocalFileTime(&m, &l))
+					{
+						ret = FileTimeToSystemTime(&l, pmodify) == TRUE;
+						if (!ret)
+							break;
+					}
+				}
+				if (paccess)
+				{
+					if (FileTimeToLocalFileTime(&a, &l))
+					{
+						ret = FileTimeToSystemTime(&l, paccess) == TRUE;
+						if (!ret)
+							break;
+					}
+				}
+			}
+
+			CloseHandle(h);
+
+			break;
+		}
+
+		return ret;
+	}
+
 	static void register_tray(HWND owner, HICON icon, bool reg)
 	{
 		if(reg)
@@ -531,7 +578,8 @@ void CusbtoolsDlg::remove_pnp_que(ONLNSCANNER* pnp)
 			close_device(pnp_que_[i]);
 			if (pnp)
 			{
-				pnp_que_.erase(pnp_que_.begin() + i);
+				if(pnp_que_[i].dlg == NULL)
+					pnp_que_.erase(pnp_que_.begin() + i);
 				break;
 			}
 			else