diff --git a/CHANGELOG.md b/CHANGELOG.md
index 69b26e6bb7..00a78818d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,9 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 ### Added
 - added Ability to import encrypted archive files directly [#4255](https://github.com/sandboxie-plus/Sandboxie/issues/4255)
 
+### Changed
+- when the sbiesvc.exe worker crashes it now can automatically be restarted.
+
 ### Fixed
 - fixed issue with sandbox path entry combo boxes
 - fixed Proxy for GetRawInputDeviceInfoW() causes a buffer overflow [#4267](https://github.com/sandboxie-plus/Sandboxie/issues/4267) (thanks marti4d)
diff --git a/Sandboxie/core/dll/callsvc.c b/Sandboxie/core/dll/callsvc.c
index c14f192315..c9cef604f7 100644
--- a/Sandboxie/core/dll/callsvc.c
+++ b/Sandboxie/core/dll/callsvc.c
@@ -1,6 +1,6 @@
 /*
  * Copyright 2004-2020 Sandboxie Holdings, LLC 
- * Copyright 2020 David Xanatos, xanasoft.com
+ * Copyright 2020-2024 David Xanatos, xanasoft.com
  *
  * This program is free software: you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
@@ -572,11 +572,11 @@ _FX ULONG SbieDll_QueuePutRpl(const WCHAR *QueueName,
 
 
 //---------------------------------------------------------------------------
-// SbieDll_QueuePutReq
+// SbieDll_QueuePutReqImpl
 //---------------------------------------------------------------------------
 
 
-_FX ULONG SbieDll_QueuePutReq(const WCHAR *QueueName,
+_FX ULONG SbieDll_QueuePutReqImpl(const WCHAR *QueueName,
                               void *DataPtr,
                               ULONG DataLen,
                               ULONG *out_RequestId,
@@ -623,6 +623,9 @@ _FX ULONG SbieDll_QueuePutReq(const WCHAR *QueueName,
 
     if (! NT_SUCCESS(status)) {
 
+        if(req->event_handle)
+            CloseHandle((HANDLE)req->event_handle);
+
         if (out_RequestId)
             *out_RequestId = 0;
         if (out_EventHandle)
@@ -633,6 +636,71 @@ _FX ULONG SbieDll_QueuePutReq(const WCHAR *QueueName,
 }
 
 
+//---------------------------------------------------------------------------
+// SbieDll_StartProxy
+//---------------------------------------------------------------------------
+
+
+_FX ULONG SbieDll_StartProxy(const WCHAR *QueueName)
+{
+    NTSTATUS status;
+    QUEUE_CREATE_REQ req;
+    QUEUE_CREATE_RPL *rpl;
+
+    req.h.length = sizeof(QUEUE_CREATE_REQ);
+    req.h.msgid  = MSGID_QUEUE_STARTUP;
+    wcscpy(req.queue_name, QueueName);
+    req.event_handle =
+        (ULONG64)(ULONG_PTR)CreateEvent(NULL, FALSE, FALSE, NULL);
+
+    if (! req.event_handle)
+        status = STATUS_UNSUCCESSFUL;
+    else {
+
+        rpl = (QUEUE_CREATE_RPL *)SbieDll_CallServer(&req.h);
+        if (! rpl)
+            status = STATUS_SERVER_DISABLED;
+        else {
+            status = rpl->h.status;
+            Dll_Free(rpl);
+        }
+
+        if (NT_SUCCESS(status)) {
+
+            if (WaitForSingleObject((HANDLE)(ULONG_PTR)req.event_handle, 10 * 1000) != 0)
+                status = STATUS_TIMEOUT;
+        }
+
+        CloseHandle((HANDLE)(ULONG_PTR)req.event_handle);
+    }
+
+    return status;
+}
+
+
+//---------------------------------------------------------------------------
+// SbieDll_QueuePutReq
+//---------------------------------------------------------------------------
+
+
+_FX ULONG SbieDll_QueuePutReq(const WCHAR *QueueName,
+                              void *DataPtr,
+                              ULONG DataLen,
+                              ULONG *out_RequestId,
+                              HANDLE *out_EventHandle)
+{
+    NTSTATUS status = SbieDll_QueuePutReqImpl(QueueName, DataPtr, DataLen, out_RequestId, out_EventHandle);
+    if (status == STATUS_OBJECT_NAME_NOT_FOUND) {
+
+        if (NT_SUCCESS(SbieDll_StartProxy(QueueName))) {
+
+            status = SbieDll_QueuePutReqImpl(QueueName, DataPtr, DataLen, out_RequestId, out_EventHandle);
+        }
+    }
+    return status;
+}
+
+
 //---------------------------------------------------------------------------
 // SbieDll_QueueGetRpl
 //---------------------------------------------------------------------------
diff --git a/Sandboxie/core/svc/GuiServer.cpp b/Sandboxie/core/svc/GuiServer.cpp
index c373287e5c..c82f467d60 100644
--- a/Sandboxie/core/svc/GuiServer.cpp
+++ b/Sandboxie/core/svc/GuiServer.cpp
@@ -4670,3 +4670,50 @@ ULONG GuiServer::KillJob(SlaveArgs* args)
       
     return STATUS_SUCCESS;
 }
+
+
+//---------------------------------------------------------------------------
+// StartAsync
+//---------------------------------------------------------------------------
+
+struct SStartupParam
+{
+    ULONG session_id;
+    HANDLE hEvent;
+};
+
+ULONG GuiServer__StartupWorker(void* _Param)
+{
+    SStartupParam* pParam = (SStartupParam*)_Param;
+
+    //
+    // thart the proxy process
+    //
+
+    GuiServer::GetInstance()->StartSlave(pParam->session_id);
+
+    //
+    // notify the requesting party that the server is now up and running
+    //
+
+    SetEvent(pParam->hEvent);
+
+    HeapFree(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS, pParam);
+    return 0;
+}
+
+ULONG GuiServer::StartAsync(ULONG session_id, HANDLE hEvent)
+{
+    SStartupParam* pParam = (SStartupParam*)HeapAlloc(GetProcessHeap(), 0, sizeof(SStartupParam));
+    pParam->session_id = session_id;
+    pParam->hEvent = hEvent;
+
+    HANDLE hThread = CreateThread(NULL, 0, GuiServer__StartupWorker, (void *)pParam, 0, NULL);
+    if (!hThread) {
+        HeapFree(GetProcessHeap(), HEAP_GENERATE_EXCEPTIONS, pParam);
+        return STATUS_UNSUCCESSFUL;
+    }
+    CloseHandle(hThread);
+    return STATUS_SUCCESS;
+}
+
diff --git a/Sandboxie/core/svc/GuiServer.h b/Sandboxie/core/svc/GuiServer.h
index 49993d23cf..0b1fbc4119 100644
--- a/Sandboxie/core/svc/GuiServer.h
+++ b/Sandboxie/core/svc/GuiServer.h
@@ -34,6 +34,8 @@ class GuiServer
 
     static GuiServer *GetInstance();
 
+    ULONG StartAsync(ULONG session_id, HANDLE hEvent);
+
     bool InitProcess(HANDLE hProcess, ULONG process_id, ULONG session_id,
                      BOOLEAN add_to_job);
 
diff --git a/Sandboxie/core/svc/msgids.h b/Sandboxie/core/svc/msgids.h
index 1cc1613199..918f68c82a 100644
--- a/Sandboxie/core/svc/msgids.h
+++ b/Sandboxie/core/svc/msgids.h
@@ -143,6 +143,7 @@
 #define MSGID_QUEUE_PUTRPL                      0x1E03
 #define MSGID_QUEUE_PUTREQ                      0x1E04
 #define MSGID_QUEUE_GETRPL                      0x1E05
+#define MSGID_QUEUE_STARTUP                     0x1E10
 #define MSGID_QUEUE_NOTIFICATION                0x1EFF
 
 #define MSGID_EPMAPPER                          0x1F00
diff --git a/Sandboxie/core/svc/queueserver.cpp b/Sandboxie/core/svc/queueserver.cpp
index aaa0e01e41..60e2ce974d 100644
--- a/Sandboxie/core/svc/queueserver.cpp
+++ b/Sandboxie/core/svc/queueserver.cpp
@@ -24,6 +24,7 @@
 #include "queueserver.h"
 #include "queuewire.h"
 #include "core/dll/sbieapi.h"
+#include "GuiServer.h"
 
 
 //---------------------------------------------------------------------------
@@ -111,6 +112,10 @@ MSG_HEADER *QueueServer::Handler(void *_this, MSG_HEADER *msg)
 
     HANDLE idProcess = (HANDLE)(ULONG_PTR)PipeServer::GetCallerProcessId();
 
+    if (msg->msgid == MSGID_QUEUE_STARTUP) {
+        return pThis->StartupHandler(msg, idProcess);
+    }
+
     if (msg->msgid == MSGID_QUEUE_NOTIFICATION) {
         pThis->NotifyHandler(idProcess);
         return NULL;
@@ -952,3 +957,85 @@ void QueueServer::DeleteRequestObj(LIST *RequestsList, void *_RequestObj)
     List_Remove(RequestsList, RequestObj);
     HeapFree(m_heap, 0, RequestObj);
 }
+
+
+//---------------------------------------------------------------------------
+// StartupHandler
+//---------------------------------------------------------------------------
+
+
+MSG_HEADER *QueueServer::StartupHandler(MSG_HEADER *msg, HANDLE idProcess)
+{
+    WCHAR *QueueName = NULL;
+    HANDLE hProcess = NULL;
+    HANDLE hEvent = NULL;
+    ULONG status;
+
+    EnterCriticalSection(&m_lock);
+
+    QUEUE_CREATE_REQ *req = (QUEUE_CREATE_REQ *)msg;
+    if (req->h.length < sizeof(QUEUE_CREATE_REQ)) {
+        status = STATUS_INVALID_PARAMETER;
+        goto finish;
+    }
+
+    //
+    //
+    //
+
+    QueueName = MakeQueueName(idProcess, req->queue_name, &status);
+    if (! QueueName)
+        goto finish;
+
+    QUEUE_OBJ *QueueObj = (QUEUE_OBJ *)FindQueueObj(QueueName);
+    if (QueueObj) { // already exists
+        status = STATUS_SUCCESS;
+        goto finish;
+    }
+
+    status = OpenProcess(idProcess, &hProcess,
+                         PROCESS_DUP_HANDLE | PROCESS_QUERY_INFORMATION);
+    if (! NT_SUCCESS(status))
+        goto finish;
+
+    status = DuplicateEvent(hProcess, req->event_handle, &hEvent);
+    if (! NT_SUCCESS(status))
+        goto finish;
+
+    //
+    //
+    //
+
+    ULONG session_id;
+    if (!NT_SUCCESS(SbieApi_QueryProcess(idProcess, NULL, NULL, NULL, &session_id))) {
+        status = STATUS_ACCESS_DENIED;
+        goto finish;
+    }
+
+    if (_wcsnicmp(req->queue_name, L"*GUIPROXY", 9) == 0) {
+
+        status = GuiServer::GetInstance()->StartAsync(session_id, hEvent);
+    }
+    else {
+
+        status = STATUS_INVALID_PARAMETER;
+    }
+
+    if (NT_SUCCESS(status))
+        hEvent = NULL;
+
+finish:
+
+    LeaveCriticalSection(&m_lock);
+
+    if (hEvent)
+        CloseHandle(hEvent);
+
+    if (hProcess)
+        CloseHandle(hProcess);
+
+    if (QueueName)
+        HeapFree(m_heap, 0, QueueName);
+
+    return SHORT_REPLY(status);
+}
diff --git a/Sandboxie/core/svc/queueserver.h b/Sandboxie/core/svc/queueserver.h
index be7f0cb249..67a4392aa6 100644
--- a/Sandboxie/core/svc/queueserver.h
+++ b/Sandboxie/core/svc/queueserver.h
@@ -51,6 +51,8 @@ class QueueServer
 
     MSG_HEADER *GetRplHandler(MSG_HEADER *msg, HANDLE idProcess);
 
+    MSG_HEADER *StartupHandler(MSG_HEADER *msg, HANDLE idProcess);
+
     void NotifyHandler(HANDLE idProcess);
 
     LONG OpenProcess(HANDLE idProcess, HANDLE *out_hProcess,