Open explorer and click on Tools--Folder Options--View--place a check
in the box for "Show hidden files and folders"--uncheck the box for
"Hide protected operating system files"--click "Apply"--click "OK".
Now, goto, and right-click on the hidden file--select "Properties"--in
the properties box, under the "General" tab uncheck the box
"Hidden"--Apply--OK. This should make the file visible again.
You can try the following:
Start
Search
More advanced options
Search hidden files and folders
When found right click and select:
Properties
Uncheck hidden