How to open Windows 7 hidden file tips

There are important documents in the work that need to be hidden, but after hiding, I want to find out but I don't know how to find it. I forgot to say Computer
Installed Windows
7 The system and Windows
XP system interface settings are not the same, how can I find hidden files?

1. Turn on the computer and select “Organization> in the upper left corner of the window.

2, select “folders and search options”.

3, will open the folder options under our common XP system.

4, select “View”.

5. In the "hidden files and folders", select according to your needs. If you select "Popular", "Warning" is selected.