lost files, names of files still exist
 

For some reason suddenly my excel and word files (what had not been stored in
doc folders) have lost their contents, but not their names. They also moved
from My Documents to Recent (some of these files I had for a long time).
When I had a proper look, they now only consists of 1ko and it cannot find
its shortcut to open the file.
Is there any way to recover the contents?

Thanks