WHY WONT MY DOCUMENTS OPEN!?!?!?!?

Like right now im seriously piss off right now! I wrote a novel on the computer and put it on my flash drive because I was leaving for a short period. But the document wont work it keep saying, "An error occur trying to read cherry blossom." Its microsoft word. So when I come home someone redid my computer system and now my save document are gone! I don't care about the other stuff but my novel is gone! Now okay maybe it wouldn't have been publish but I work months on that and now I'm pissed. So how to open the remaining document that I have also does it help that I put a pass word on it when you try to read it!