is it one particular word file or any word file?
If it's any word file, you will need to reinstall office / word
if it's just one file, you can most likely open it in wordpad
some formatting will of course be broken, but text and pictures will probably be good
hm... this made me search for a doc / docx - and I've found none!
I guess they all were on the external backup disk that I lost. Okay, i cannot CHECK my advice. But you can.