diff --git a/docs/source/release-notes/3.0.3.rst b/docs/source/release-notes/3.0.3.rst
index ded24c7..0361879 100644
--- a/docs/source/release-notes/3.0.3.rst
+++ b/docs/source/release-notes/3.0.3.rst
@@ -1,6 +1,9 @@
 3.0.3 -- 2016-07-28 (unreleased)
 --------------------------------
 
+- Disable ``--jobs`` for any version of Python on Windows.
+  (See also `this Python bug report`_)
+
 - Fix ``# noqa`` comments followed by a ``:`` and explanation broken by
   3.0.0 (See also `GitLab#178`_)
 
@@ -12,3 +15,6 @@
     https://gitlab.com/pycqa/flake8/issues/178
 .. _GitLab#195:
     https://gitlab.com/pycqa/flake8/issues/195
+
+.. _this Python bug report:
+    https://bugs.python.org/issue27649
diff --git a/src/flake8/checker.py b/src/flake8/checker.py
index d331b0c..57fd896 100644
--- a/src/flake8/checker.py
+++ b/src/flake8/checker.py
@@ -167,7 +167,8 @@ class Manager(object):
 
         if (utils.is_windows() and
                 not utils.can_run_multiprocessing_on_windows()):
-            LOG.warning('The --jobs option is only available on Windows on '
+            LOG.warning('The --jobs option is not available on Windows due to'
+                        ' a bug (https://bugs.python.org/issue27649) in '
                         'Python 2.7.11+ and 3.3+. We have detected that you '
                         'are running an unsupported version of Python on '
                         'Windows. Ignoring --jobs arguments.')
diff --git a/src/flake8/utils.py b/src/flake8/utils.py
index 1e18316..55c699e 100644
--- a/src/flake8/utils.py
+++ b/src/flake8/utils.py
@@ -164,10 +164,20 @@ def is_windows():
     return os.name == 'nt'
 
 
+# NOTE(sigmavirus24): If and when https://bugs.python.org/issue27649 is fixed,
+# re-enable multiprocessing support on Windows.
 def can_run_multiprocessing_on_windows():
     # type: () -> bool
     """Determine if we can use multiprocessing on Windows.
 
+    This presently will **always** return False due to a `bug`_ in the
+    :mod:`multiprocessing` module on Windows. Once fixed, we will check
+    to ensure that the version of Python contains that fix (via version
+    inspection) and *conditionally* re-enable support on Windows.
+
+    .. _bug:
+        https://bugs.python.org/issue27649
+
     :returns:
         True if the version of Python is modern enough, otherwise False
     :rtype:
@@ -175,7 +185,7 @@ def can_run_multiprocessing_on_windows():
     """
     is_new_enough_python27 = (2, 7, 11) <= sys.version_info < (3, 0)
     is_new_enough_python3 = sys.version_info > (3, 2)
-    return is_new_enough_python27 or is_new_enough_python3
+    return False and (is_new_enough_python27 or is_new_enough_python3)
 
 
 def is_using_stdin(paths):
diff --git a/tests/unit/test_checker_manager.py b/tests/unit/test_checker_manager.py
index 8240723..7e9c5b1 100644
--- a/tests/unit/test_checker_manager.py
+++ b/tests/unit/test_checker_manager.py
@@ -25,7 +25,8 @@ def test_oserrors_cause_serial_fall_back():
     assert manager.using_multiprocessing is False
 
 
-def test_oserrors_are_reraised():
+@mock.patch('flake8.utils.is_windows', return_value=False)
+def test_oserrors_are_reraised(is_windows):
     """Verify that OSErrors will cause the Manager to fallback to serial."""
     err = OSError(errno.EAGAIN, 'Ominous message')
     style_guide = style_guide_mock()