diff --git a/src/calibre/devices/__init__.py b/src/calibre/devices/__init__.py
index 816db4976d..3f35612a9e 100644
--- a/src/calibre/devices/__init__.py
+++ b/src/calibre/devices/__init__.py
@@ -194,59 +194,17 @@ def debug(ioreg_to_tmp=False, buf=None, plugins=None,
                     pass
 
 def device_info(ioreg_to_tmp=False, buf=None):
-    from calibre.devices.scanner import DeviceScanner, win_pnp_drives
-    from calibre.constants import iswindows
-    import re
+    from calibre.devices.scanner import DeviceScanner
 
     res = {}
-    device_details = {}
-    device_set = set()
-    drive_details = {}
-    drive_set = set()
-    res['device_set'] = device_set
-    res['device_details'] = device_details
-    res['drive_details'] = drive_details
-    res['drive_set'] = drive_set
+    res['device_set'] = device_set = set()
+    res['device_details'] = device_details = {}
 
-    try:
-        s = DeviceScanner()
-        s.scan()
-        devices = (s.devices)
-        if not iswindows:
-            devices = [list(x) for x in devices]
-            for dev in devices:
-                for i in range(3):
-                    dev[i] = hex(dev[i])
-                d = dev[0] + dev[1] + dev[2]
-                device_set.add(d)
-                device_details[d] = dev[0:3]
-        else:
-            for dev in devices:
-                vid = re.search('vid_([0-9a-f]*)&', dev)
-                if vid:
-                    vid = vid.group(1)
-                    pid = re.search('pid_([0-9a-f]*)&', dev)
-                    if pid:
-                        pid = pid.group(1)
-                        rev = re.search('rev_([0-9a-f]*)$', dev)
-                        if rev:
-                            rev = rev.group(1)
-                            d = vid+pid+rev
-                            device_set.add(d)
-                            device_details[d] = (vid, pid, rev)
-
-            drives = win_pnp_drives(debug=False)
-            for drive,details in drives.iteritems():
-                order = 'ORD_' + str(drive.order)
-                ven = re.search('VEN_([^&]*)&', details)
-                if ven:
-                    ven = ven.group(1)
-                    prod = re.search('PROD_([^&]*)&', details)
-                    if prod:
-                        prod = prod.group(1)
-                        d = (order, ven, prod)
-                        drive_details[drive] = d
-                        drive_set.add(drive)
-    finally:
-        pass
+    s = DeviceScanner()
+    s.scan()
+    devices = s.devices
+    devices = [tuple(x) for x in devices]
+    for dev in devices:
+        device_set.add(dev)
+        device_details[dev] = dev[0:3]
     return res
diff --git a/src/calibre/devices/user_defined/driver.py b/src/calibre/devices/user_defined/driver.py
index 2449d5062c..24dac528ce 100644
--- a/src/calibre/devices/user_defined/driver.py
+++ b/src/calibre/devices/user_defined/driver.py
@@ -34,41 +34,33 @@ class USER_DEFINED(USBMS):
     SUPPORTS_SUB_DIRS = True
 
     EXTRA_CUSTOMIZATION_MESSAGE = [
-        _('USB Vendor ID (in hex)') + ':::<p>' +
-            _('Get this ID using Preferences -> Misc -> Get information to '
-              'set up the user-defined device') + '</p>',
-        _('USB Product ID (in hex)')+ ':::<p>' +
-            _('Get this ID using Preferences -> Misc -> Get information to '
-              'set up the user-defined device') + '</p>',
-        _('USB Revision ID (in hex)')+ ':::<p>' +
-            _('Get this ID using Preferences -> Misc -> Get information to '
-              'set up the user-defined device') + '</p>',
+        _('USB Vendor ID (in hex)') + ':::<p>' + _(
+            'Get this ID using Preferences -> Misc -> Get information to '
+            'set up the user-defined device') + '</p>',
+        _('USB Product ID (in hex)')+ ':::<p>' + _(
+            'Get this ID using Preferences -> Misc -> Get information to '
+            'set up the user-defined device') + '</p>',
+        _('USB Revision ID (in hex)')+ ':::<p>' + _(
+            'Get this ID using Preferences -> Misc -> Get information to '
+            'set up the user-defined device') + '</p>',
         '',
-        _('Windows main memory vendor string') + ':::<p>' +
-            _('This field is used only on windows. '
-              'Get this ID using Preferences -> Misc -> Get information to '
-              'set up the user-defined device') + '</p>',
-        _('Windows main memory ID string') + ':::<p>' +
-            _('This field is used only on windows. '
-              'Get this ID using Preferences -> Misc -> Get information to '
-              'set up the user-defined device') + '</p>',
-        _('Windows card A vendor string') + ':::<p>' +
-            _('This field is used only on windows. '
-              'Get this ID using Preferences -> Misc -> Get information to '
-              'set up the user-defined device') + '</p>',
-        _('Windows card A ID string') + ':::<p>' +
-            _('This field is used only on windows. '
-              'Get this ID using Preferences -> Misc -> Get information to '
-              'set up the user-defined device') + '</p>',
-        _('Main memory folder') + ':::<p>' +
-            _('Enter the folder where the books are to be stored. This folder '
-              'is prepended to any send_to_device template') + '</p>',
-        _('Card A folder') + ':::<p>' +
-            _('Enter the folder where the books are to be stored. This folder '
-              'is prepended to any send_to_device template') + '</p>',
-        _('Swap main and card A') + ':::<p>' +
-            _('Check this box if the device\'s main memory is being seen as '
-              'card a and the card is being seen as main memory') + '</p>',
+        _('Unused (leave blank)') + ':::<p>' + _(
+            'This field is no longer used, leave it blank.') + '</p>',
+        _('Unused (leave blank)') + ':::<p>' + _(
+            'This field is no longer used, leave it blank.') + '</p>',
+        _('Unused (leave blank)') + ':::<p>' + _(
+            'This field is no longer used, leave it blank.') + '</p>',
+        _('Unused (leave blank)') + ':::<p>' + _(
+            'This field is no longer used, leave it blank.') + '</p>',
+        _('Main memory folder') + ':::<p>' + _(
+            'Enter the folder where the books are to be stored. This folder '
+            'is prepended to any send_to_device template') + '</p>',
+        _('Card A folder') + ':::<p>' + _(
+            'Enter the folder where the books are to be stored. This folder '
+            'is prepended to any send_to_device template') + '</p>',
+        _('Swap main and card A') + ':::<p>' + _(
+            'Check this box if the device\'s main memory is being seen as '
+            'card a and the card is being seen as main memory') + '</p>',
     ]
     EXTRA_CUSTOMIZATION_DEFAULT = [
                 '0xffff',
diff --git a/src/calibre/gui2/preferences/device_user_defined.py b/src/calibre/gui2/preferences/device_user_defined.py
index e08a726fdc..7e8bc890f1 100644
--- a/src/calibre/gui2/preferences/device_user_defined.py
+++ b/src/calibre/gui2/preferences/device_user_defined.py
@@ -10,8 +10,6 @@ __docformat__ = 'restructuredtext en'
 from PyQt5.Qt import QDialog, QVBoxLayout, QPlainTextEdit, QTimer, \
     QDialogButtonBox, QPushButton, QApplication, QIcon, QMessageBox
 
-from calibre.constants import iswindows
-
 def step_dialog(parent, title, msg, det_msg=''):
     d = QMessageBox(parent)
     d.setWindowTitle(title)
@@ -60,11 +58,12 @@ class UserDefinedDevice(QDialog):
                 self.close()
                 return
             after = device_info()
-            new_drives = after['drive_set'] - before['drive_set']
             new_devices = after['device_set'] - before['device_set']
             res = ''
-            if (not iswindows or len(new_drives)) and len(new_devices) == 1:
+            if len(new_devices) == 1:
                 def fmtid(x):
+                    if isinstance(x, (int, long)):
+                        x = hex(x)
                     if not x.startswith('0x'):
                         x = '0x' + x
                     return x
@@ -76,20 +75,6 @@ class UserDefinedDevice(QDialog):
                             fmtid(after['device_details'][d][1]) + '\n'
                     res += _('USB Revision ID (in hex)') + ': ' + \
                             fmtid(after['device_details'][d][2]) + '\n'
-                if iswindows:
-                    # sort the drives by the order number
-                    for i,d in enumerate(sorted(new_drives,
-                                    key=lambda x: after['drive_details'][x][0])):
-                        if i == 0:
-                            res +=  _('Windows main memory vendor string') + ': ' + \
-                                    after['drive_details'][d][1] + '\n'
-                            res += _('Windows main memory ID string') + ': ' + \
-                                    after['drive_details'][d][2] + '\n'
-                        else:
-                            res +=  _('Windows card A vendor string') + ': ' + \
-                                    after['drive_details'][d][1] + '\n'
-                            res += _('Windows card A ID string') + ': ' + \
-                                    after['drive_details'][d][2] + '\n'
             trailer = _(
                     'Copy these values to the clipboard, paste them into an '
                     'editor, then enter them into the USER_DEVICE by '