Unable to open files error in encoding MS Word document file

Hello,
There is an error opening my sample law firm workflow. I am using windows 7 64 bit operating system and encoded those files in a Microsoft word document application. After a few minutes I restarted my computer and go downstairs to get something to eat and when I get back, I opened my laptop and get an error stating unable to open file. Please do help me, those files are very important.
Waiting for your support.
