diff --git a/DSView/pv/config/appconfig.cpp b/DSView/pv/config/appconfig.cpp
index c0431ae7..41c190aa 100644
--- a/DSView/pv/config/appconfig.cpp
+++ b/DSView/pv/config/appconfig.cpp
@@ -299,16 +299,6 @@ std::string AppConfig::GetProtocolFormat(const std::string &protocolName)
 }
 
 //-------------api
-QString GetDirectoryName(QString path)
-{
-    int lstdex = path.lastIndexOf('/');
-    if (lstdex != -1)
-    {
-        return path.left(lstdex);
-    }
-    return path;
-}
-
 QString GetIconPath()
 {   
     QString style = AppConfig::Instance()._frameOptions.style;
diff --git a/DSView/pv/config/appconfig.h b/DSView/pv/config/appconfig.h
index 88a168df..bf300a97 100644
--- a/DSView/pv/config/appconfig.h
+++ b/DSView/pv/config/appconfig.h
@@ -35,8 +35,6 @@
 #define APP_NAME  "DSView"
   
 //--------------------api---
-
-QString GetDirectoryName(QString path);
 QString GetIconPath();
 QString GetAppDataDir();
 QString GetResourceDir();
diff --git a/DSView/pv/dialogs/protocolexp.cpp b/DSView/pv/dialogs/protocolexp.cpp
index 9546c0ff..739467ad 100755
--- a/DSView/pv/dialogs/protocolexp.cpp
+++ b/DSView/pv/dialogs/protocolexp.cpp
@@ -39,6 +39,7 @@
 #include "../config/appconfig.h"
 #include "../dsvdef.h"
 #include "../utility/encoding.h"
+#include "../utility/path.h"
 
 using namespace boost;
 using namespace std;
@@ -140,7 +141,7 @@ void ProtocolExp::accept()
             if(f.suffix().compare(ext))
                 file_name+=tr(".")+ext;
 
-            QString fname = GetDirectoryName(file_name);
+            QString fname = path::GetDirectoryName(file_name);
             if (fname != app._userHistory.openDir)
             {
                 app._userHistory.protocolExportPath = fname;
diff --git a/DSView/pv/mainwindow.cpp b/DSView/pv/mainwindow.cpp
index 54ce31c2..91063650 100644
--- a/DSView/pv/mainwindow.cpp
+++ b/DSView/pv/mainwindow.cpp
@@ -94,6 +94,7 @@
 #include "dsvdef.h"
 #include "appcontrol.h"
 #include  "utility/encoding.h"
+#include "utility/path.h"
 
 #define BASE_SESSION_VERSION 2
   
@@ -439,20 +440,19 @@ void MainWindow::update_device_list()
         //load specified file name from application startup param
        if (_bFirstLoad){
            _bFirstLoad = false;
- 
-           if (AppControl::Instance()->_open_file_name != ""){
-                QString opf(QString::fromUtf8(AppControl::Instance()->_open_file_name.c_str()));
-                QFile fpath;   
+           
+            QString ldFileName(AppControl::Instance()->_open_file_name.c_str());
 
-                if (fpath.exists(opf)){             
-                    qDebug()<<"auto load file:"<<opf;
-                    on_load_file(opf);
+            if (ldFileName != ""){
+                if (QFile::exists(ldFileName)){             
+                    qDebug()<<"auto load file:"<<ldFileName;
+                    on_load_file(ldFileName);
                 }
                 else{
-                    qDebug()<<"file is not exists:"<<opf;
-                    MsgBox::Show(tr("Open file error!"), opf.toStdString().c_str());      
+                    qDebug()<<"file is not exists:"<<ldFileName;
+                    MsgBox::Show(tr("Open file error!"), ldFileName, NULL);      
                 }              
-           } 
+            } 
        }
 }
 
@@ -920,7 +920,7 @@ void MainWindow::on_screenShot()
 
         pixmap.save(fileName, suffix.toLatin1());
  
-        fileName = GetDirectoryName(fileName);
+        fileName = path::GetDirectoryName(fileName);
 
         if (app._userHistory.screenShotPath != fileName){
             app._userHistory.screenShotPath = fileName;
diff --git a/DSView/pv/storesession.cpp b/DSView/pv/storesession.cpp
index a772cbd0..dde4c7db 100755
--- a/DSView/pv/storesession.cpp
+++ b/DSView/pv/storesession.cpp
@@ -1189,7 +1189,7 @@ QString StoreSession::MakeSaveFile(bool bDlg)
             return ""; //no select file
         }
 
-        QString _dir_path = GetDirectoryName(default_name);
+        QString _dir_path = path::GetDirectoryName(default_name);
 
         if (_dir_path != app._userHistory.saveDir)
         {
@@ -1261,7 +1261,7 @@ QString StoreSession::MakeExportFile(bool bDlg)
         }
 
         bool bChange = false;
-        QString _dir_path = GetDirectoryName(default_name);
+        QString _dir_path = path::GetDirectoryName(default_name);
         if (_dir_path != app._userHistory.exportDir)
         {
             app._userHistory.exportDir = _dir_path;
diff --git a/DSView/pv/toolbars/filebar.cpp b/DSView/pv/toolbars/filebar.cpp
index eef34b9d..0803a251 100755
--- a/DSView/pv/toolbars/filebar.cpp
+++ b/DSView/pv/toolbars/filebar.cpp
@@ -29,6 +29,7 @@
 #include "../device/devinst.h" 
 #include "../ui/msgbox.h"
 #include "../config/appconfig.h"
+#include "../utility/path.h"
 
 namespace pv {
 namespace toolbars {
@@ -143,7 +144,7 @@ void FileBar::on_actionOpen_triggered()
         tr("DSView Data (*.dsl)"));
 
     if (!file_name.isEmpty()) { 
-        QString fname = GetDirectoryName(file_name);
+        QString fname = path::GetDirectoryName(file_name);
         if (fname != app._userHistory.openDir){
             app._userHistory.openDir = fname;
             app.SaveHistory();
@@ -180,7 +181,7 @@ void FileBar::on_actionLoad_triggered()
         tr("DSView Session (*.dsc)"));
 
     if (!file_name.isEmpty()) {
-        QString fname = GetDirectoryName(file_name);
+        QString fname = path::GetDirectoryName(file_name);
         if (fname != app._userHistory.sessionDir){
             app._userHistory.sessionDir = fname;
             app.SaveHistory();
@@ -229,7 +230,7 @@ void FileBar::on_actionStore_triggered()
         if(f.suffix().compare("dsc"))
             file_name.append(tr(".dsc"));
 
-        QString fname = GetDirectoryName(file_name);
+        QString fname = path::GetDirectoryName(file_name);
         if (fname != app._userHistory.sessionDir){
             app._userHistory.sessionDir = fname;
             app.SaveHistory();
diff --git a/DSView/pv/utility/path.cpp b/DSView/pv/utility/path.cpp
index 1cce527c..692f3166 100644
--- a/DSView/pv/utility/path.cpp
+++ b/DSView/pv/utility/path.cpp
@@ -21,21 +21,20 @@
 
 #include "path.h"
 
-#ifdef _WIN32
-#include <QTextCodec>
-#endif
-
 namespace pv::path
 {
     std::string ConvertPath(QString fileName)
     {
-#ifdef _WIN32
-        QTextCodec *code = QTextCodec::codecForName("GB2312");
-        if (code != NULL)
-        {
-            return code->fromUnicode(fileName).data();
-        }
-#endif
         return fileName.toUtf8().toStdString();
     }
+
+    QString GetDirectoryName(QString path)
+    {
+        int lstdex = path.lastIndexOf('/');
+        if (lstdex != -1)
+        {
+            return path.left(lstdex);
+        }
+        return path;
+    }
 }
\ No newline at end of file
diff --git a/DSView/pv/utility/path.h b/DSView/pv/utility/path.h
index 2f5729ec..4d42a6d9 100644
--- a/DSView/pv/utility/path.h
+++ b/DSView/pv/utility/path.h
@@ -28,6 +28,8 @@
 namespace pv::path
 {
     std::string ConvertPath(QString fileName);
+
+    QString GetDirectoryName(QString path);
 }
  
 #endif
\ No newline at end of file
diff --git a/common/minizip/ioapi.c b/common/minizip/ioapi.c
index 7f5c191b..3c5c1dbf 100644
--- a/common/minizip/ioapi.c
+++ b/common/minizip/ioapi.c
@@ -28,6 +28,10 @@
 
 #include "ioapi.h"
 
+#ifdef _WIN32
+#include <windows.h>
+#endif
+
 voidpf call_zopen64 (const zlib_filefunc64_32_def* pfilefunc,const void*filename,int mode)
 {
     if (pfilefunc->zfile_func64.zopen64_file != NULL)
@@ -112,6 +116,34 @@ static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, in
 
 static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename, int mode)
 {
+#ifdef _WIN32
+    FILE* file = NULL;
+    const wchar_t* mode_fopen = NULL;
+    if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
+        mode_fopen = L"rb";
+    else
+    if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
+        mode_fopen = L"r+b";
+    else
+    if (mode & ZLIB_FILEFUNC_MODE_CREATE)
+        mode_fopen = L"wb"; 
+
+    int wcSize = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, filename, -1, NULL, 0);
+    if (wcSize == 0) { 
+        return NULL;
+    }
+    wchar_t *wcName = (wchar_t *)malloc(sizeof(wchar_t) * wcSize + 8);
+    if (wcName == NULL) {
+       return NULL;
+    }
+    MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS, filename, -1, wcName, wcSize);
+ 
+    if ((filename!=NULL) && (mode_fopen != NULL))
+        file = _wfopen((const wchar_t*)wcName, mode_fopen);
+    free(wcName);
+
+    return file;
+#else
     FILE* file = NULL;
     const char* mode_fopen = NULL;
     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
@@ -126,6 +158,7 @@ static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename,
     if ((filename!=NULL) && (mode_fopen != NULL))
         file = FOPEN_FUNC((const char*)filename, mode_fopen);
     return file;
+#endif
 }