If you’re having problems opening PDF files that have been damaged or corrupted you may have some luck with MuPDF.
I found this lightweight PDF reader when a colleague at work was having trouble opening a PDF sent in via e-mail. Adobe Reader, Adobe Pro, Foxit Reader and GScript all failed to open the file in question – MuPDF was the only one to succeed.
Plus there’s nothing to install – just extract the exe from it’s zip archive and run.