diff --git a/win/setup/scanner/CumtennScan_App_Setup.iss b/win/setup/scanner/CumtennScan_App_Setup.iss
index e338846..8eb600c 100644
--- a/win/setup/scanner/CumtennScan_App_Setup.iss
+++ b/win/setup/scanner/CumtennScan_App_Setup.iss
@@ -182,13 +182,16 @@ begin
     begin
       if RegQueryStringValue(HKLM, 'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{ADE66CB2-15FD-4BF8-BFA7-ED3E239C9ACE}_is1', 'UninstallString', ResultStr) then
       begin
-        ResultStr := RemoveQuotes(ResultStr);  
-        if Exec(ResultStr, '/verysilent', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
+        if MsgBox('扫描软件已安装，是否卸载原版本？', mbConfirmation, MB_YESNO) = IDYES then
         begin
-          if 0 =  ResultCode then
+          ResultStr := RemoveQuotes(ResultStr);  
+          if Exec(ResultStr, '/verysilent', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
           begin
-            Sleep(1000)
-            Result := true;
+            if 0 =  ResultCode then
+            begin
+              Sleep(1000)
+              Result := true;
+            end
           end
         end
       end
diff --git a/win/setup/scanner/HanvonScan_App_Setup.iss b/win/setup/scanner/HanvonScan_App_Setup.iss
index 6621b7a..ec8880a 100644
--- a/win/setup/scanner/HanvonScan_App_Setup.iss
+++ b/win/setup/scanner/HanvonScan_App_Setup.iss
@@ -239,13 +239,16 @@ begin
     begin
       if RegQueryStringValue(HKLM, 'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{4486975C-CBCF-430B-BED1-427866D1738E}_is1', 'UninstallString', ResultStr) then
       begin
-        ResultStr := RemoveQuotes(ResultStr);  
-        if Exec(ResultStr, '/verysilent', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
+        if MsgBox('扫描软件已安装，是否卸载原版本？', mbConfirmation, MB_YESNO) = IDYES then
         begin
-          if 0 =  ResultCode then
+          ResultStr := RemoveQuotes(ResultStr);  
+          if Exec(ResultStr, '/verysilent', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
           begin
-            Sleep(1000)
-            Result := true;
+            if 0 =  ResultCode then
+            begin
+              Sleep(1000)
+              Result := true;
+            end
           end
         end
       end
diff --git a/win/setup/scanner/HuaGoScan_App_Setup.iss b/win/setup/scanner/HuaGoScan_App_Setup.iss
index cd091d5..b178cad 100644
--- a/win/setup/scanner/HuaGoScan_App_Setup.iss
+++ b/win/setup/scanner/HuaGoScan_App_Setup.iss
@@ -231,13 +231,16 @@ begin
     begin
       if RegQueryStringValue(HKLM, 'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{7076DC53-5C2F-4216-9783-2A6F954FEB3E}_is1', 'UninstallString', ResultStr) then
       begin
-        ResultStr := RemoveQuotes(ResultStr);  
-        if Exec(ResultStr, '/verysilent', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
+        if MsgBox('扫描软件已安装，是否卸载原版本？', mbConfirmation, MB_YESNO) = IDYES then
         begin
-          if 0 =  ResultCode then
+          ResultStr := RemoveQuotes(ResultStr);  
+          if Exec(ResultStr, '/verysilent', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
           begin
-            Sleep(1000)
-            Result := true;
+            if 0 =  ResultCode then
+            begin
+              Sleep(1000)
+              Result := true;
+            end
           end
         end
       end
diff --git a/win/setup/scanner/LanxumScan_App_Setup.iss b/win/setup/scanner/LanxumScan_App_Setup.iss
index 5a99b2b..aade376 100644
--- a/win/setup/scanner/LanxumScan_App_Setup.iss
+++ b/win/setup/scanner/LanxumScan_App_Setup.iss
@@ -179,13 +179,16 @@ begin
     begin
       if RegQueryStringValue(HKLM, 'SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{F2890F43-A51C-4379-BB79-992616B1D6BD}_is1', 'UninstallString', ResultStr) then
       begin
-        ResultStr := RemoveQuotes(ResultStr);  
-        if Exec(ResultStr, '/verysilent', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
+        if MsgBox('扫描软件已安装，是否卸载原版本？', mbConfirmation, MB_YESNO) = IDYES then
         begin
-          if 0 =  ResultCode then
+          ResultStr := RemoveQuotes(ResultStr);  
+          if Exec(ResultStr, '/verysilent', '', SW_HIDE, ewWaitUntilTerminated, ResultCode) then
           begin
-            Sleep(1000)
-            Result := true;
+            if 0 =  ResultCode then
+            begin
+              Sleep(1000)
+              Result := true;
+            end
           end
         end
       end