Have you tried manually entering the extension .doc or .docx at the end of the filename to see if it opens in word?
Thanks for the completely useless response. Go on mate, go click some of them links and realise theres actually very little that would help me.
For the record the file was corrupt and was a PDF file
Did you get it sorted then? Ive heard of EFX (E-Fax), but not IFXThere are a few programs that could convert the e-fax in to some readable format too.