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01-04-2016, 06:21 AM
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How to restore identification of password protected excel file
My password protected xlsx Office2007 file became corrupted.
I'm getting " can't open .... file format or extension is invalid ..." error message from the Excel. The system or the Excel can't identify the file as a protected one. I assume the file "body" the contained data are intact but the file information (header or descriptor or whatever ) corrupted The password is known, so I'ts not about hacking. I've made many unsuccessful attempt and tried different ways and 4-5 different tools to recover the file. The common methods, automatic repair, rename to zip etc. are useless too. So How can I restore the file information and get back the access to my file. Any help would be greatly appreciated! 
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