Doesn't sound Linux related to me, but maybe problems with the versions of Word you are running.
You can do this... get the md5sum program for windows here:
Run that against a file on your windows box and compare the answer you get when you run the Linux command line "md5sum" on the same file. If they are the same, then you don't have a corruption problem. Not to mention, if you can open it at all in either version of Word, I would say its probably not corrupted. The files may include features that are incompatible between these two versions of Word.