diff --git a/src/unix/darwin.c b/src/unix/darwin.c
index 77301722..44638b81 100644
--- a/src/unix/darwin.c
+++ b/src/unix/darwin.c
@@ -84,9 +84,8 @@ void uv__platform_loop_delete(uv_loop_t* loop) {
   uv__cf_loop_signal_t* s;
 
   assert(loop->cf_loop != NULL);
-  CFRunLoopStop(loop->cf_loop);
+  uv__cf_loop_signal(loop, NULL, NULL);
   uv_thread_join(&loop->cf_thread);
-  loop->cf_loop = NULL;
 
   uv_sem_destroy(&loop->cf_sem);
   uv_mutex_destroy(&loop->cf_mutex);
@@ -145,7 +144,12 @@ void uv__cf_loop_cb(void* arg) {
     item = QUEUE_HEAD(&split_head);
 
     s = QUEUE_DATA(item, uv__cf_loop_signal_t, member);
-    s->cb(s->arg);
+
+    /* This was a termination signal */
+    if (s->cb == NULL)
+      CFRunLoopStop(loop->cf_loop);
+    else
+      s->cb(s->arg);
 
     QUEUE_REMOVE(item);
     free(s);
diff --git a/src/win/process.c b/src/win/process.c
index 8ef420e6..f98767a4 100644
--- a/src/win/process.c
+++ b/src/win/process.c
@@ -49,7 +49,22 @@ static HANDLE uv_global_job_handle_;
 static uv_once_t uv_global_job_handle_init_guard_ = UV_ONCE_INIT;
 
 
-static void uv__init_global_job_handle() {
+static void uv__init_global_job_handle(void) {
+  /* Create a job object and set it up to kill all contained processes when
+   * it's closed. Since this handle is made non-inheritable and we're not
+   * giving it to anyone, we're the only process holding a reference to it.
+   * That means that if this process exits it is closed and all the processes
+   * it contains are killed. All processes created with uv_spawn that are not
+   * spawned with the UV_PROCESS_DETACHED flag are assigned to this job.
+   *
+   * We're setting the JOB_OBJECT_LIMIT_SILENT_BREAKAWAY_OK flag so only the
+   * processes that we explicitly add are affected, and *their* subprocesses
+   * are not. This ensures that our child processes are not limited in their
+   * ability to use job control on Windows versions that don't deal with
+   * nested jobs (prior to Windows 8 / Server 2012). It also lets our child
+   * processes created detached processes without explicitly breaking away
+   * from job control (which uv_spawn doesn't, either).
+   */
   SECURITY_ATTRIBUTES attr;
   JOBOBJECT_EXTENDED_LIMIT_INFORMATION info;
 
@@ -920,7 +935,18 @@ int uv_spawn(uv_loop_t* loop, uv_process_t* process,
   }
 
   process_flags = CREATE_UNICODE_ENVIRONMENT;
+
   if (options.flags & UV_PROCESS_DETACHED) {
+    /* Note that we're not setting the CREATE_BREAKAWAY_FROM_JOB flag. That
+     * means that libuv might not let you create a fully deamonized process
+     * when run under job control. However the type of job control that libuv
+     * itself creates doesn't trickle down to subprocesses so they can still
+     * daemonize.
+     *
+     * A reason to not do this is that CREATE_BREAKAWAY_FROM_JOB makes the
+     * CreateProcess call fail if we're under job control that doesn't allow
+     * breakaway.
+     */
     process_flags |= DETACHED_PROCESS | CREATE_NEW_PROCESS_GROUP;
   }
 
@@ -943,8 +969,21 @@ int uv_spawn(uv_loop_t* loop, uv_process_t* process,
     if (!(options.flags & UV_PROCESS_DETACHED)) {
       uv_once(&uv_global_job_handle_init_guard_, uv__init_global_job_handle);
 
-      if (!AssignProcessToJobObject(uv_global_job_handle_, info.hProcess))
-        uv_fatal_error(GetLastError(), "AssignProcessToJobObject");
+      if (!AssignProcessToJobObject(uv_global_job_handle_, info.hProcess)) {
+        /* AssignProcessToJobObject might fail if this process is under job
+         * control and the job doesn't have the
+         * JOB_OBJECT_LIMIT_SILENT_BREAKAWAY_OK flag set, on a Windows version
+         * that doesn't support nested jobs.
+         *
+         * When that happens we just swallow the error and continue without
+         * establishing a kill-child-on-parent-exit relationship, otherwise
+         * there would be no way for libuv applications run under job control
+         * to spawn processes at all.
+         */
+        DWORD err = GetLastError();
+        if (err != ERROR_ACCESS_DENIED)
+          uv_fatal_error(err, "AssignProcessToJobObject");
+      }
     }
 
     /* Set IPC pid to all IPC pipes. */
diff --git a/src/win/stream.c b/src/win/stream.c
index 097f3497..edc5407c 100644
--- a/src/win/stream.c
+++ b/src/win/stream.c
@@ -56,7 +56,7 @@ int uv_accept(uv_stream_t* server, uv_stream_t* client) {
 int uv_read_start(uv_stream_t* handle, uv_alloc_cb alloc_cb,
     uv_read_cb read_cb) {
   if (handle->flags & UV_HANDLE_READING) {
-    uv__set_sys_error(handle->loop, UV_EALREADY);
+    uv__set_artificial_error(handle->loop, UV_EALREADY);
     return -1;
   }
 
@@ -82,7 +82,7 @@ int uv_read_start(uv_stream_t* handle, uv_alloc_cb alloc_cb,
 int uv_read2_start(uv_stream_t* handle, uv_alloc_cb alloc_cb,
     uv_read2_cb read_cb) {
   if (handle->flags & UV_HANDLE_READING) {
-    uv__set_sys_error(handle->loop, UV_EALREADY);
+    uv__set_artificial_error(handle->loop, UV_EALREADY);
     return -1;
   }