Well if you want to convert pdf to word(doc) completely free and with lifetime key.Also want features of Batch conversion,convert copy and restricted pdf,convert whole or selected pdf,preserve original layout,quick conversion then here is the software for you..
AnyBizSoft PDF to Word
Source: http://www.anypdftools.com
After installing you will have to get keycode from their site for lifetime use completely free. link is here ---> http://www.anypdftools.com/pdf-to-word-get-keycode.html
