diff --git a/src/calibre/devices/usbms/device.py b/src/calibre/devices/usbms/device.py
index f0c54d7051..59c9849ca2 100644
--- a/src/calibre/devices/usbms/device.py
+++ b/src/calibre/devices/usbms/device.py
@@ -7,7 +7,14 @@ intended to be subclassed with the relevant parts implemented for a particular
 device. This class handles device detection.
 '''
 
-import os, subprocess, time, re, sys, glob
+import glob
+import os
+import re
+import struct
+import subprocess
+import sys
+import time
+
 from itertools import repeat
 
 from calibre.devices.interface import DevicePlugin
@@ -492,7 +499,29 @@ class Device(DeviceConfig, DevicePlugin):
                 self.open_osx()
 
     def eject_windows(self):
-        pass
+        win32file = __import__('win32file', globals(), locals(), [], -1)
+        win32con = __import__('win32con', globals(), locals(), [], -1)
+        win32shell = __import__('win32com.shell.shell', globals(), locals(), [], -1)
+        win32shellcon = __import__('win32com.shell.shellcon', globals(), locals(), [], -1)
+
+        FSCTL_LOCK_VOLUME = 0x0090018
+        FSCTL_DISMOUNT_VOLUME = 0x00090020
+        IOCTL_STORAGE_MEDIA_REMOVAL = 0x002D4804
+        IOCTL_STORAGE_EJECT_MEDIA = 0x002D4808
+
+        for x in ('_main_prefix', '_card_a_prefix', '_card_b_prefix'):
+            x = getattr(self, x, None)
+            if x is not None:
+                vol = win32file.CreateFile(x, win32con.GENERIC_READ | win32con.GENERIC_WRITE, win32con.FILE_SHARE_READ | win32con.FILE_SHARE_WRITE, None, win32con.OPEN_EXISTING, 0, None)
+                try:
+                    win32file.DeviceIoControl(vol, FSCTL_LOCK_VOLUME, '', 0, None)
+                    win32file.DeviceIoControl(vol, FSCTL_DISMOUNT_VOLUME, '', 0, None)
+                    win32file.DeviceIoControl(vol, IOCTL_STORAGE_MEDIA_REMOVAL, struct.pack('B', 0), 0, None)
+                    win32file.DeviceIoControl(vol, IOCTL_STORAGE_EJECT_MEDIA, '', 0, None)
+                    time.sleep(2)
+                    win32shell.SHChangeNotify(win32shellcon.SHCNE_DRIVEREMOVED, win32shellcon.SHCNF_PATH, x)
+                finally:
+                    win32file.CloseHandle(vol)
 
     def eject_osx(self):
         for x in ('_main_prefix', '_card_a_prefix', '_card_b_prefix'):