Just to add, debug is saying I'm running 32 bit windows but I'm on a 64 bit system?
calibre Debug log
calibre 1.7 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')
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