This is posted by proxy for a friend with no current internet access:
I created a password-protected Word 2010 doc at work, brought it home using a flash disk, tried opening it using Word 2007, and it won't open. The annoying thing is, it doesn't even present me with a password-entry box. Word runs, but flat refuses to open the doc. I have the password, but what bloody good is it when I'm not presented with the password-input dialogue?
OpenOffice Writer yields no joy, and WordPad tells me the document is either 'Corrupt or protected under Rights Management.' NotePad opens it quite willingly, and I see frequent references to 'encryption' that look coherent, with large blocks of text that did look so.
Winzip says the file is 'not a valid archive', which an unencrypted Word 2010 file should be a valid archive.
Is there anything I can do to recover this file?