diff --git a/CWeChatRobot/pch.cpp b/CWeChatRobot/pch.cpp
index fa20ab235faf4671d6bff732c7bcdf05f54e6ed6..6cc9a69097a429bf9c98c124831a4bee0139af30 100644
--- a/CWeChatRobot/pch.cpp
+++ b/CWeChatRobot/pch.cpp
@@ -234,6 +234,7 @@ DWORD StartRobotService() {
     bool status = Injert(wxPid, workPath);
     if (status == 1) {
         CloseHandle(hProcess);
+        hProcess = NULL;
         return status;
     }
     return status;
@@ -242,13 +243,16 @@ DWORD StartRobotService() {
 DWORD StopRobotService() {
     DWORD cpid = GetCurrentProcessId();
     DWORD wxPid = GetWeChatPid();
-    if (!wxPid)
+    if (!wxPid) {
+        hProcess = NULL;
         return cpid;
+    }
     if (!hProcess)
         hProcess = OpenProcess(PROCESS_ALL_ACCESS, FALSE, wxPid);
     RemoveDll(wxPid);
     ZeroMemory((wchar_t*)SelfInfoString.c_str(), SelfInfoString.length() * 2 + 2);
     CloseHandle(hProcess);
+    hProcess = NULL;
     StopReceiveMessage();
     return cpid;
 }
diff --git a/Release/CWeChatRobot.exe b/Release/CWeChatRobot.exe
index 5b756837d02ab29e8cbbd1a943b7cf9b17a7d6fb..5f263194134b758a8a9bbdee7d2e907eb14d3d32 100644
Binary files a/Release/CWeChatRobot.exe and b/Release/CWeChatRobot.exe differ