calibre 1.4  isfrozen: True is64bit: False
Windows-7-6.1.7601-SP1 Windows ('32bit', 'WindowsPE')
('Windows', '7', '6.1.7601')
Python 2.7.5
Windows: ('7', '6.1.7601', 'SP1', 'Multiprocessor Free')
USB devices on system:
[u'usb\\root_hub&vid10de&pid07fe&rev00a1',
 u'usb\\root_hub20&vid10de&pid056a&rev00a1',
 u'usb\\vid_03f0&pid_6004&rev_0100',
 u'usb\\vid_046e&pid_5522&rev_0090',
 u'usb\\vid_046e&pid_5522&rev_0090&mi_00',
 u'usb\\vid_046e&pid_5522&rev_0090&mi_01',
 u'usb\\vid_046e&pid_5522&rev_0090&mi_02',
 u'usb\\vid_0bda&pid_0111&rev_1122']
Traceback (most recent call last):
  File "site-packages\calibre\devices\scanner.py", line 85, in __call__
DriveError: No removable drives found
Drives detected:

No disabled plugins
Looking for devices of type: MTP_DEVICE
The Windows WPD service says there are no portable devices connected
 
Looking for devices...
 
Devices possibly connected: None