diff --git a/paramiko/win_pageant.py b/paramiko/win_pageant.py
index d77d58f..b7a3fcf 100644
--- a/paramiko/win_pageant.py
+++ b/paramiko/win_pageant.py
@@ -29,20 +29,14 @@ import array
 import platform
 import ctypes.wintypes
 
-# if you're on windows, you should have one of these, i guess?
-# ctypes is part of standard library since Python 2.5
+# if pywin32 is available, use it
 _has_win32all = False
-_has_ctypes = False
 try:
     # win32gui is preferred over win32ui to avoid MFC dependencies
     import win32gui
     _has_win32all = True
 except ImportError:
-    try:
-        import ctypes
-        _has_ctypes = True
-    except ImportError:
-        pass
+    pass
 
 _AGENT_COPYDATA_ID = 0x804e50ba
 _AGENT_MAX_MSGLEN = 8192
@@ -58,7 +52,7 @@ def _get_pageant_window_object():
             return hwnd
         except win32gui.error:
             pass
-    elif _has_ctypes:
+    else:
         # Return 0 if there is no Pageant window.
         return ctypes.windll.user32.FindWindowA('Pageant', 'Pageant')
     return None
@@ -71,9 +65,7 @@ def can_talk_to_agent():
     This checks both if we have the required libraries (win32all or ctypes)
     and if there is a Pageant currently running.
     """
-    if (_has_win32all or _has_ctypes) and _get_pageant_window_object():
-        return True
-    return False
+    return bool(_get_pageant_window_object())
 
 ULONG_PTR = ctypes.c_uint64 if platform.architecture()[0] == '64bit' else ctypes.c_uint32
 class COPYDATASTRUCT(ctypes.Structure):
@@ -114,10 +106,8 @@ def _query_pageant(msg):
             # win32gui.SendMessage should also allow the same pattern as
             # ctypes, but let's keep it like this for now...
             response = win32gui.SendMessage(hwnd, win32con_WM_COPYDATA, ctypes.sizeof(cds), ctypes.addressof(cds))
-        elif _has_ctypes:
-            response = ctypes.windll.user32.SendMessageA(hwnd, win32con_WM_COPYDATA, ctypes.sizeof(cds), ctypes.byref(cds))
         else:
-            response = 0
+            response = ctypes.windll.user32.SendMessageA(hwnd, win32con_WM_COPYDATA, ctypes.sizeof(cds), ctypes.byref(cds))
 
         if response > 0:
             datalen = pymap.read(4)